Probably you can fix this by updating your cards drivers.
Also make sure the feature is officially supported by using the GfxDriverCaps3D command:
http://www.blitzbasic.com/b3ddocs/command.php?name=GfxDriverCaps3D&ref=goto
Also make sure the feature is officially supported by using the GfxDriverCaps3D command:
http://www.blitzbasic.com/b3ddocs/command.php?name=GfxDriverCaps3D&ref=goto