I downloaded and installed the beta version last week through steam.  Just tried playing it today through clicking "play" in steam and going to where it is installed and double-clicking "GalCiv3.exe".  Nothing happens in either case.

(I see something flash on the task bar briefly, but not long enough to read what it says).

I have:

Windows Vista Home Premium, Service Pack 2.

Intel Core i7 940 (Quad-core, 2,93 GHz)

12 GB Ram

64-bit OS

NVIDIA GeForce GTX 560

I haven't had problems playing any other games I've installed recently.

Any suggestions/Next steps?