After a few emails back and forth I have yet to come up with a solution.
We have tried rolling back decklink driver versions to the last 4 versions. They all allow output to an external monitor from inside DaVinci but none of them will show up on the Panasonic vt30.
Looks like it may be a windows DaVinci issue as many others using the Decklink HD Extreme+DaVinci+Panasonic vt30 are all operating off of Macs.
If anyone has any other suggestions I will give them a try.
Thanks