Local connect fine remote connect fail

[apache lives]

Title: Local connect fine remote connect fail

Version: 3.0.3/3.0.4

OS: Windows 7

Java Version: j7u4

Description of Problem:

I host my own small server running tekkit (latest as of ~18/06/12), if i connect to my server from my home pc (same LAN) i can build refineries and pumps and power etc aok PERFECT, but if i connect to my server from a remote connection (via Internet) it wont load any map chunks i only see monsters etc, no blocks no nothing and after about ~10 seconds it drops me, it wont let me walk/fly or anything.

What i have tried:

Leaving my dude far away from the base -- it loads perfect until i walk back to my base and as soon as im there chunks stop loading and eventually it kicks me.

Fresh map then first connect remotely - works perfect till i make refineries and pumps and electricity etc

Disconnect and reconnect quickly a few times - might see a single chunk and then i get kicked

New map and remake my base - same issue

I use Wooden Pipes (tanks out), Glass Fibre Cables, Energy Links and Gold Waterproof Pipes, MV converters and Tesla's, Refineries and Pumps that is all.

Any help would be appreciated i hope no one else has already asked this (double post), if you need any more information let me know.

Cheers.

Error Messages:

End of Stream (client)

Error Log:

2012-06-11 22:22:14 [iNFO] Connection reset

2012-06-11 22:22:14 [sEVERE] java.net.SocketException: Socket closed

2012-06-11 22:22:14 [iNFO] G3cho lost connection: disconnect.quitting

2012-06-11 22:22:14 [sEVERE] 	at java.net.SocketOutputStream.socketWrite(Unknown Source)

2012-06-11 22:22:14 [sEVERE] 	at java.net.SocketOutputStream.write(Unknown Source)

2012-06-11 22:22:14 [sEVERE] 	at java.io.BufferedOutputStream.flushBuffer(Unknown Source)

2012-06-11 22:22:14 [sEVERE] 	at java.io.BufferedOutputStream.flush(Unknown Source)

2012-06-11 22:22:14 [sEVERE] 	at java.io.DataOutputStream.flush(Unknown Source)

2012-06-11 22:22:14 [sEVERE] 	at net.minecraft.server.NetworkWriterThread.run(SourceFile:103)

[Torezu]

Moving liquids around with BuildCraft is hard on the server and connection. That's just how it is, so unless you have a decent upload/download speed on the server, I wouldn't try to connect with a slow connection.

[apache lives]

even a small ammount? one refinery?

whats a "decent" upload/download?

why would that d/c me from my server with an error? it just halts the chunks from loading like totally.

[The_DarthMoogle]

lol u on dial up

nah, I don't see why this should be an issue connectivity wise, if you're on a LAN

Could actually be a server issue in disguise? Memory, perhaps?

[apache lives]

on ADSL not dial up

LAN connection works aok its when i remote connect to my server using the internet it wont load chunks

My other bukkit/minecraft servers work perfect with the same setup

Server issue - thought that at first so now im using a totally different machine - still same fault

This has me stumped, is there any other logs or information i can give to assist or anything?