HL2: Lost Coast Error

[paladin]

I bought Half Life 2 and Half Life 2: Lost Coast today, and when I tried to load Lost Coast it gave me this error: "Engine Error! Could not load: gameui" I reinstalled the game, and it still gives me the error. I looked around on the steam help and support website and all I could find was a patch from M$. That did jack. What should I doooooo?!

[Zeph]

http://forums.steampowered.com/forums/index.php
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Register and bitch there until someone can help you. It's worked for me in the past.

[paladin]

http://forums.steampowered.com/forums/index.php
Steam Users Forums - Powered by vBulletin

Register and bitch there until someone can help you. It's worked for me in the past.

Don't worry, I already have...