This is what it looks like when I try to start up a server:
Desktop\Games and related\Games\Builder\Minecraft Collection\SMP\(Technic Craftbukkit Server)>java -Xmx3G -Xms2G -jar Tekkit.jar nogui
Error occurred during initialization of VM
Could not reserve enough space for object heap
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.
Desktop\Games and related\Games\Builder\Minecraft Collection\SMP\(Technic Craftbukkit Server)>pause
Press any key to continue . . .
and after pressing a key it terminates.
So when I start up the Technic pack launcher for the client side of the server, it shows the "checking launcher version," screen, it immediately stops. I'm not sure if it matters, but I use Windows 7.