Sorry for the big break, i've been having problems with Hammer. Each time i load my map it crashes TF2

Last time I updated it, the Spawn rooms weren't finished and it needed improvements
So this is where my Testers come in. if you know how to use Source SDK Hammer could you test out my map, fix it, change it, re-design it I don't mind.
all I want it to do is to work completely fine.
http://www.megaupload.com/?d=0SIMDWV3
any changes and improvements made please could you let me know as soon as possible
