Nvidia GE520 HDMI 3 TVs

We have a couple of old PC's we use for PowerPoint presentations that connect via a Tripplite HDMI convertor over cat5 to the TV's. This card works great under XP. We are now rolling out windows 7 PC's and for the life of me I am unable to get the card to work the same. I essentially need the TV wizard to be able to clone to the 3 TV's?

I need one HDMI output pushed through the convertor which then splits the signal 3 ways. I can get two of the TV's to work with the presentation but not the 3rd. If I need to upgrade I will but it has to be PCIe and around $100. It looks like the drivers and options were stripped going to Windows 7.

Thanks for any input....
 
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