Problems Playing on my Server

[flipsielord]

I have a tekkit server that runs properly and i can play on it from other computers but not the one that it is running on. Does anyone know what i am doing wrong? When i open the multiplayer tab in tekkit, it says my server is running but when i try to connect, all it says is "end of stream." Also, when i open the multiplayer tab as soon as i do, in the command prompt of the server, it says i lost connection even before i try. Anyone know what do do?! Thanks!

[Watchful11]

What ip are you using to connect?

Try "localhost"