need help with Tandy RL and VGA card

so far I've tried 3 VGA cards and they all screw up Leisure Suit Larry the same way. I assumed it was an issue with the Tandy thinking the VGA card was a CGA or EGA card and I downloaded and ran VGAFIXC but it had no effect. I also tried Prince of Persia which defaulted to VGA mode and looked and played fine. Commander Keen IV said CGA/EGA/VGA were all detected in the menu but It will only play in CGA mode. Its the demo version so maybe that was the only mode available even if it detects others?

best way to show whats happening is a video so...


https://youtu.be/pu50WZpJp6U

any ideas? maybe i'm applying the VGAFIXc program wrong? I've tried running it off the floppy and hard drive but it never fixes the issue.