Did you follow the instructions properly? what language version of server your using? (it must be en-US) Did you grab all the files from vista by running "get bda files.bat"? yes yes yes all went good, but the "regsvr32 ksxbar.ax" can't do this even manually can you tell me exactly names of files needed to register ksxbar.ax and kswdmcap.ax? (excluding theirselves of course and ksxbar.ax.mui and kswdmcap.ax.mui) Hi, after doing a clean install of server 2008 ent x64, i realized that "kstvtune.ax and ksxbar.ax" are not required to register, and it cant be registered as well. The whole point is that them 2 ax files needs to be present in syswow64 and system32 directory, so when you launch any tv applications it uses these 2 files for its purpose. They cant be registered even on vista, i tried registering, but it will not register as the whole point is your tv application to access these 2 files only for your tv app to work. Just run the "BDA.inf" from bda folder the directX 9 version, and restart to see if your tv card works, if it don't then the only solution i would recommend is do a clean install and run my setup pack. Hope this helps