If it's IC2 1.95, the server's still running 3.0.4 (matching client is 3.0.3). You can either downgrade your client (I would back up your waypoints, delete the entire client-side tekkit folder, manual-select, and let it install), or you can persuade the server to update to 3.1.2, which is probably what you're running.
Version numbers are important when you're listing mods that don't match yours, fyi.
I wouldn't try to always keep the client the most up-to-date with Tekkit, as a lot of servers don't update right away.