Screen Resolution

Hi all. I have a very peculiar problem in Solaris 10. The output of the m64config -prconf command with regards the Card Adapter is the following.

Card possible resolutions: 720x400x85, 640x480x60, 640x480x72, 640x480x75
800x600x56, 800x600x60, 800x600x72, 800x600x75, 1024x768x60
1024x768x70, 1024x768x75, 1280x1024x75, 1024x768x85, 800x600x85
640x480x85, 1280x1024x60, 1152x900x66, 1152x900x76, 1280x1024x67
1600x1280x76, 1920x1080x72, 1280x800x76, 1440x900x76
1600x1000x66, 1600x1000x76, 1920x1200x70, 1280x1024x85
1280x1024x76, 1152x864x75, 1600x1200x75, 1600x1200x60
1024x768x85, 800x600x75, 640x480x85, 1920x1200x60, 1920x1080x60
1400x1050x60, vga, svga, vga, svga, sxga+, 1152, 1280, 800x600
1024x768, 1280x1024, 1152x900, 1400x1050, 1600x1280, 1920x1080
1600x1000, 1920x1200, 1600x1200

My LCD currently supports 1440x900 at 60Hz. However as you can see the resolution i have marked with bold, that is supported by the adapter is the 1440x900x76. So when i try this resolution the monitor switches off with the message input is not supported. So i'd like to ask you if it is possible to configure as a supported adapter video mode the 1440x900x60? Is there a way to set it to this mode even is not indicated as a supported video code by the adapter? Thank you.