A7V8X-X Memory issues.

Hi,

I am having issues with my memory upgrade.
I currently run 512MB of PC3200
ATI All in Wonder Radeon 9200 Graphics card (Sisoft Sandra tells me 256MB - 254MB Video, 117MB system)

I am trying to replace the single stick with 2 1GB sticks, again PC3200.

I put these in place and booted up, only to find there was no graphics output.
so I took one stick out, and again the boot sounded normal but no graphics output, even to the BIOS page.

I replaced the original 512MB stick and the system is fine.
The graphics aperture is set at 256MB.

the board has 3 memory slots and allows a maximum of 3GB of memory, The manual states that using PC3200 only allows me to use 2 banks and PC2700 to use 4 banks (there are only 3 slots???)

The Memory I am trying to install has this on an attached stick
"1GB DDR 400 PC 3200A
AE25D1284 00194 0737"

I hope some one alot more PC upgrade savvy can help me out on this.
Thanks