level not working properly

I'm using srb2 doom builder 2 for srb2CB just for clarification, my thok barrier doesn't work properly and the graphics are all messed up, please help http://www.2shared.com/file/Y0T4Ehb3/better.html I'm kinda new at this I've been trying to follow the wiki

http://www53.zippyshare.com/v/66887850/file.html

That's the link to my fix.
Things that I fixed were the thok-barrier and some graphics problems
The only thing I thing I messed up on might be the tags.

thx I wish the tutorials were more detail escptaliy how to make graphics

sorry for the double post thx for the help btw http://www.2shared.com/file/fM6GZiBm/better2.html I tried doing the reverse gravity gimmick I follow the tutorial for the srb2DB since there was no tutorial for the srb2DB2 on gravity manipulation unless I'm missing something I can't for the life of me get it to work right if anyone fixes it can they tell me what I did wrong