I added three trigger_hurts and changed two ladders into ramps in my map, but none of the changes are happening in the bsp. They are saving in hammer and when I close and reopen the vmf in hammer the changes are there.

When I run the game in dod:s the ladders are back and the spawn protecting "hurts" are not working. Ideas?

I know you are saying it's writing the BSP fine but I have had this with some of my maps in the past, compile errors.

Rename or delete the BSP.

I've had this problem many times, heres the fix;

This often occurs to me when I make an entity displacement brush (Brush entity + displacement = :tnp: ) Go to the top of your compile log and about the 7th line down there will be some sort of error, it doesn't normaly have caps which makes it hard to find.

Heres the what it looks like:
** Executing...
** Command: "c:\steam\steamapps\email\sourcesdk\bin\vbsp.exe"
** Parameters: -game "c:\steam\steamapps\email\day of defeat source\dod"
"C:\steam\SteamApps\email\sourcesdk_content\hl2mp\m apsrc\tests"

Valve Software - vbsp.exe (Nov 17 2005)
1 threads
materialPath: c:\steam\steamapps\email\day of defeat source\dod\materials
Loading C:\steam\SteamApps\email\sourcesdk_content\hl2mp\m apsrc\tests.vmf
Error: displacement found on a(n) func_detail entity - not supported

Check for errors in hammer, and if there is still a problem upload your compile log here:

http://www.interlopers.net/errors/errors.php?page=checklog

hmm yeh i have had this problem before

I've noticed this problem to be an error with the PRT file. So I would just delete that (back it up too) and have the compiler recreate it - maybe that was a slightly different problem though.