Unable to use Tekkit?

[Lexerdoodle]

I was trying to log onto a Tekkit server, to play with my friends, and it loaded up and I clicked 'Join Server' and It was loading, and It stopped for a second and it said it was unable to join because Forge wasn't working or whatever and that I needed the mods... I don't know what to do. I am so confused :I

[Munaus]

You are indeed confusing, as is your title. Does singleplayer work?

Does any other server work? Do all Tekkit servers give errors or only one?

[freakachu]

either the server you're trying to connect to is not running tekkit, you're launching one of the older tekkit versions (tekkit lite, tekkit classic) instead of actual tekkit, or it's the other way around and the server is running an old version of tekkit while you're connecting with a newer one.  double check the server you're trying to play on to make sure you're using the right pack.  make sure the pack you're using matches the server exactly.