Either:
A) Start a new project using the video for windows settting (I think it's called this, but basically, don't choose a DV project). And set your project settings to match those of your video (install
AVIcodec to find these out).
or
B)
1) Download and install the panosonic DV codec
2) Install VirtualDub
3) run the AVI through VirtualDub and encode usingv the DV codec#
4) import this to your project