Angel of Darkness - only few resolutions on Radeon

[robertmo]

Sapphire Radeon X1950 Pro 512 MB, Catalyst 7.6,
22" Samsung 226BW (1680x1050)
Athlon XP 2000 MHz,
1 GB DDR 400 MHz,
Windows XP SP2, DX 9.0c

When I go to game's settings -> resolution I can only choose from:
1280x1024@60Hz
1024x768@60Hz
800x600@60Hz
800x600@56Hz
640x480@60Hz

If I change monitor to:
20" Samsung 204B (1600x1200)
I can also choose from 1600x1200@60Hz

But If I change gfx card to Geforce 2 Mx400 32 MB I can choose from all accessible resolutions from 320x200 to 1680x1050 at all accessible refresh rates.

Does anyone know why my Radeon card doesn't allow me to choose all other resolutions (actually i need only 1680x1050)? I have also tried demo version with the same problem. Also tried all the patches V42, V49, V52

All other games work OK.

[robertmo]

Problem solved:

It was the Screen Format - 32 bit A2R10G10B10
Changing it to something else unlockes the rest of resolutions.