What one? ESF-World, HL2Files or ModDb?from this one
You need to install it into a new folder within your "Half-Life" folder.I installed in the Valve folder.
You installed it into the wrong folder. You need to install it into your "Half-Life" folder.I put it in the Valve folder.
Then I can no longer help you.I am Non Steam
Did you install the open beta into your Half-Life folder?Help me too i have Half-life too (with steam) and i have the same error