01daniel10

but why isnt thier Dev. server builds than O.o

Although what confused me is that why would they have a tekkit latest build without having the compatible server build :/

I actually just started a server and it was updated to 3.0.4 and i was having this problem also so i just started going through all the build (i was using latest) and it seems you need to use Rec. Build on the Technic Launcher with 3.0.4 to do this just open Technic Launcher select Tekkit as your modpack click option and you can do one of two things. select Always use Recommended builds or do what i do and select Manual Build Selection and next to Select Modpack build: select the dropdown menu and pick 3.0.3|1.2.5|Rec. Build :D