red skies fx5200 help

I finally got a G Froce Chaintech FX 5200 to help me fly in full screen and so on on my FS 2004.
What a dissapointment, I now get red skies and back grounds of red strips, with yellow like bolts in the sky.
I did down load the lastest Nvidia drivers to even make this card work on my desktop.
How do I fix this?
Also now some other games say the video memory is not enough, my new card is suppose to have 256 Mb memory. How to I fix this too?
My onboard shared memory card of 64 MB could at least run all my games but not FS 2004 very good.
Should I return this card and get another one?
PLease help missing my daily flights JFG 123
What a dissapointment, I now get red skies and back grounds of red strips, with yellow like bolts in the sky.
I did down load the lastest Nvidia drivers to even make this card work on my desktop.
How do I fix this?
Also now some other games say the video memory is not enough, my new card is suppose to have 256 Mb memory. How to I fix this too?
My onboard shared memory card of 64 MB could at least run all my games but not FS 2004 very good.
Should I return this card and get another one?
PLease help missing my daily flights JFG 123