Few possibilities dude
1) make sure you unpacked wormkit into your WA folder (if it's not there it wont be able to find anything)
2) Make sure all your patches / updates etc are up to date
3) Try steps installer? remove all wk stuff you have added and start again using that.
4) If you used Steps installer then remove it and just drop the .dll to the folder instead (some people have trouble with it, but for me it worked perfect so..)
5) Don't actually pay to much attention to what I say, I'm no expert (at all) but I saw you had no replies so figured I'd chuck some idea's your way
Read these pages, plenty of links there too
http://worms2d.info/Wormkit
http://worms2d.info/RubberWorm
Gl
