Magister

first thing to check is firewall settings

for starters since you downgraded your FML you might want to update it to the current for 1.5.1, if that does not work on this error is on the server then you may need to rebuild the server.jar

then look at the log, it will be in the root of the file in %appdata%

your server and client do not have the same mods, either add them to one or remove them from the other.

well first of all your cpu is a little underpowered, the above screenshot shows it running at 0.77 Ghz, with a max for that cpu type of 1.8Ghz. now as far as the cpu usage goes, minecraft seems to prefer to run mainly on a single core while using others for garbage collection, servers are even worst, and depending on how you have it showing your cpu usage it could be showing total load across all logical cores, or could be show the total per core. as far as ram goes you can generally run on 1gb of ram without issues

check your server world folder for the folders associated with those DIMs, if it is even an issue with those, i have seen that on forge server alot where it loads and unloads the dimensions on startup but it may have to do with what mods you are running if you have added or removed any. generally the unloading isnt an issue unless you get a memory leak error afterwards. all dimensions unload after so longer of not being used depending on your config setups and what chunk loaders and their configs you have going.

there are a few ways to do it, first place to check would be the forum for rei's minimap as it has instructions and tells you what you need in order to do it

did you install any mods on the server? sounds like you have mods client side that are not currently on the server

forge essentials is a forge mod, not a bukkit plugin, download forge essentials for the version of minecraft you have, it has a core mod and then multiple mods for the various other things it adds, keep in mind forge essentials also uses sql

as far as i know chunk loaders of any kind do not work in single player

minimum stone and TE makes diamond and power generator, and the worst abuse of igneous extruders is ars magicka since it becomes a EE2 type device at that point.

has it done this since you started the server up on a fresh world or was it playable for awhile before hand?

loled so hard

if you are doing multiple servers you are getting into the realm of clustering which minecraft does terribly on due to threading limitations, but for what the you are asking if you have just a small group of people around five, it should be good with a more simple server, 4 -8 cores, but the overall processing power per core is more important than how many, and a few gigs of ram to run the server, you most likley wont need more than 4 for the server opperation, and if you want to ramdisk for faster world chunk loading you will need more ram, another thing if you plan to host it from home is you will need a good strong internet connection and a router to match, one that can do either bonding or jumbo frame or you will bottle neck with a few people

even with the hosted linux vps you still run into processing limitations, generally they are good for lite server loads with a few mods, but as you add more and more you run into issues with the performance, i just recently left working on the backend of a linux vps for server hosting due to complicated reasons, but what it all comes down to is the more mods the more processing power you need, same for the player count, the ram is more dependant upon the amount of class files being loaded

it will be in the root folder for the pack, generally the .technic/whatever in the %appdata%

sometimes it isnt just location but the players themselves, if you use netstat you can see which connection and there for which player is using the bandwidth

tick threading splits the various things into their own thread, rather than almost everything running in a single thread, if you have a linux based server you can view all the things running in the one thread, you can have it list all the classes and the mod names running inside the main thread. generally the minecraft server will create multilple tasks that will see very low cpu time except for one or two, and when you quarry them you will see a massive list in the one using the most time. now i have used tick threading before and have found some incompatibilities but not a lot as it has a server script that makes modifications to a variety of mods before the server starts.

the issue you will run into is that minecraft server itself puts alot of crap into the main thread and that will only run on a single core, very little is generally handed off, most if it be GC threads. there is a server mod called tickthreading that will split things and help but can cause some issue with some mods.

generally you will have both 32 bit and 64 java on a 64 bit OS due to the fact that most browsers and plugins, applications, and so on for them are still 32, if you have 64 installed just set it as your system path to java, also for checking which java you have you can use java -d32 java -d64 it will either say it doesnt exsist or it will give you the list of help topics for testing what you currently have pathed

remove the mod in question, load a game, open nei and do an id dump, then add the mod and check its ids against the dump and reassign ids to open numbers, also all mobs in mo creatures are configurable for spawning, but it seems you need alot more power system wise to run that mod due to the increase mob load it will make, or you will start to see spaming of errors messages with something taking to much time

greg already added upgrades for all his machines to make the function off mj so that has already been done, but greg gets his hands into anything he can it would seem, and the blowing up options can be disabled in configs, i would suggest the water and rain causing machines to be destroyed being disabled as that is just problematic. greg just likes things to blow up

the frustration would all depend upon the amount of time and work they have to put into updating, but for some mod makers like greg whos mod function almost completly with just ic2 it is in the best interests to maintain it, and there may have no been an official release on the forums but the updates are being kicked out very regularly

i wouldnt say ic2 is dead, it is just being updated by another person at the moment, many mods have gone that way, been passed off and kept living and being used and the original dev may show back up eventually and take it back up which has also happened with a few mods. also ic2 is required for gregtech which is a decently fun mod once you get into it and from what i have seen greg may be involved in helping maintain ic2

reducing the view distance can cause mobs to spawn alot less or even not spawn at all, since the number of loaded chunks is used to determine the mob spawn caps, but it does help with server bandwidth