KoolDre, this is just a shot in the dark here but worth it..
Before trying this, I ask that you revert back to my previous set up with the cable box hooked up to the home theater receiver and NOT to the tv. Once you have that hooked up properly and everything turned on try this...
With your VT25 remote, click on the Viera LINK button in the upper right corner, it's next to the EXIT button. Once the Viera LINK On Screen Menu pops up on the TV screen, highlight "Speaker Output" and use the remote arrows left or right to select Home Theater. Hopefully this will now tell the TV to disable the TV speakers and use the Home Theater for sound... like I said... long shot but Im running out of ideas.
After that, im curious, on the SCBTT770 remote, click the Surround/Sleep button just one time, bottom left on the remote, and tell me what the display reads on the receiver.
Samsung 65" KS8000
Denon AVR 6300H
Klipsch F-30 Fronts
Klipsch C-20 Center
Klipsch S-20 Sides
Klipsch B-20 Rears,PA 120 12" Sub,klipsch R-10SW