We're seeing a lot of reports of problems with that camcorder lately.
The problem is that, for some reason, Panasonic has designed it to record as 50p or 60p rather than the standard 50i or 60i. This makes it incompatible or difficult to work with most consumer video editing systems!
About the only software that's guaranteed to work with it is the software that comes with the camcorder. Although a post on the community forum at Premiere Elements support site Muvipix.com seems to indicate that JohnF has found a hybrid solution.