I'm using Windows XP, latest drivers. Go see if your OverrideEdidFlags0 key in the registry (HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Video) has the same first 4 bytes as the InfoFrame key. If not, just edit it, reboot and hopefully you'll be set.
OK found the solution of the L245. If you check your registry keys, in the 0000, you will find one that's called InfoFrame. The 4 bytes at the beginning designate the model of your monitor. For me, it's 1E 6D 2C 56.
So, I put in the OverrideEdidFlags0 key the value 1E 6D 2C 56 00 00 FF FF 04...