Im trying to setup the lift and I go to right click the signs and nothing happens.

When I started up my server this error showed up. http://pastebin.com/PRDepeYn

Im using Tekkit Classic(Most Recent Version) Tekkit Classic Server(Most Recent Version) Lift(Version 35).

Please help.
Thanks,
Arrow816

Issue with the metrics plugin. It shouldn't be causing issues. What version of java are you using?