Series 3 XL/HD with Motorola CableCARD anyone?

If you have a Series3 XL/HD running with a Motorola M-series (dual tuner) CableCARD would you please let me know?

My Cable company (Florida Cable) can not get this combination working. I just need to know if anyone has this combination working. The same card in a non-XL (same cable outlet) works. I have tried two different TIVO XL's, neither worked.

My Cable provider is not aware of any other customer they have with a TIVO XL, with a CableCARD.