Make sure all your brushes are INSIDE the purple/pink box in BSP. Also, make sure you don't have a leak.
Sometimes, you will need to export twice in order for the compiling to work. If you haven't added any lighting, but would like to test your map, do a qbsp.bat compile.
Edit 4:Delete BSP
Seriously, if you insist on posting your comments, don't discourage him from mapping. You're doing the exact OPPOSITE of what xmapcom is doing, and thats demoting the mapping aspect of PB. If people like you kept on insulting and turning people away from mapping, you'll be stuck with maps like Shazam33, etc forever, because there will simply be no one willing to map.