Recently i did a patch of the programm source sdk base 2007. When i try to start a mod that uses this source it crashes saying Unable to load c:\program files (x86)\steam\steamapps\user name\source sdk base 2007\bin\filesystem_steam.dll. This happens to all mods that uses this programm, like no more room in hell , The Hidden etc.... Already tried veryfing cache files, defrag and re-installing but nothing happens. Any ideas ?