Error message when clicking on "Run Map"

When I click on Run Map in the File dropdown menu, I get an error message saying:

Error!
SteamStartup() failed: SteamStartup(0xf,0x000000000012DD70) failed with error 1: Failed create pipe: 6, Win32 Error 6 “The handle is invalid.”

Even when I try to change the settings, I get the same message. The map seems to compile fine, but I have to manually go into a source game and load the map just to test it. Can someone help me figure out why this is happening?

Restart steam?

That doesn’t help. I’ve had this problem ever since I got HL2 on PC a couple years ago, and on both computers I’ve had since then.

Is it all 100% legit?

Yeah, here’s a screenshot of my Steam games if you don’t believe me.

http://img190.imageshack.us/img190/3356/steamgames.png

Anyone? This is a really annoying problem that I’d like to fix.

Tried rebuilding your game config?

what he said. try that and that should fix it.

If that fails, try updating your GPU drivers.

[editline]05:44PM[/editline]

Or reinstall the game you’re trying to run the map with.

How do I do that? I read that if I delete the cfg file, it will automatically be rebuildt, but I want to make sure before I do so just so i don’t mess anything up.

And if this is the right way to rebuild it, which config am I supposed to do it to?

whatever config you use.
That should work fine