When I try to compile one of my maps into a bsp it goes through the proccess, but the bsp file doesn't appear, sometime it works with other maps, but I begin to add more duplicates of brushes, it won't compile, so does anybody know what my problem is
Press N and check the console if everything appears as it should be with the compile. If it does, search for the file if it appeared somewhere else. Do that first and lets see what you get.
It should appear in the base>maps folder. Also, before you run the map, be sure to set (in the console) "sv_pure 0" without quotation marks.
If you're running vista, you need to run compiles as admin.