Trouble Launching OA

[Trouble Launching OA]

Not sure if this is the right thread, but here's my issue. Every time I attempt to load the game, I get these two error messages:

"bin\config.bin/CfgInGameUI/MPTable.shadow"

and

"Error compiling pixel shader PSSpecularAlpha:0"

Does anyone know what would cause these problems? And how to fix them?

[Unable to load the game]

I know, sorry. I'm redownloading the client ASAP, figured it'd be done by the time I posted this.

[Unable to load the game]

I purchased a digital copy of this game today, but can't get it to work. I've tried downloading and deleting the client twice, but each time it says there's an error. I have Operation Arrowhead, which works fine, but the vanilla ARMA II will not work at all. Help?

[ArmA II / OA Installation problems]

I purchased a digital copy of this game today, but can't get it to work. I've tried downloading and deleting the client twice, but each time it says there's an error. I have Operation Arrowhead, which works fine, but the vanilla ARMA II will not work at all. Help?