Server Error After Steam Update

[Fragg]

I run a standalone srcds server. All was well until the latest STEAM update (August 2006). I verified and ran the hlds update tool. It went through the motions of verifying the files and updating, but now I can't launch the server. I get the following error in the console:
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Console initialized.
Could not get IServerGameDLL interface from library server.dllFailed to load server binary.
maxplayers set to 0
Network: IP xxx.xxx.x.xx, mode MP, dedicated Yes, ports 27015 SV/27005 CL
Could not get IServerGameDLL interface from library server.dllFailed to load server binary.
Can't start game, no valid server,dll loaded
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Anyone see this or have any ideas how to fix it?

[Hollanda]

Rerun the update tool, also beetlesmod & manimod give random crashes, Beetles has a Fixes beta for this update.