[madcat]

First check you have the latest Carrier Takeoff mod, you said you got version 2b ??? of that mod, version 5.2 is out and that supports the Panther.

Next check fuel load, if you fully armed and have 100% fuel then I don't think your ever get off the deck.

Taxi up the the catapult, make shore it snaps you into position. Then set flaps to take off, trim the aircraft for take off and run up to full power.

Then away you go