If your files are Dolby digital sound then they will not work in the trial because of licensing issues. They will work in the full version after free activation. The MOV's probably contain sound in the AAC format which will work in the trial.
As far as I know the GH1 is, never the less, using Dolby Digital 2 channel and the same thing applies.
See Supports response to a similar question:
The problem is with the fact that Dolby Digital decoding is unfortunately no longer supported in the trial version of the program. We needed to change the Dolby Digital activation and implementation for licensing reasons, which now calls for an online activation and the download of actual Dolby Digital decoding components from our server, which is only possible in the full version. As a result, you won't have any audio on formats using Dolby Digital audio (e.g. AVCHD and a lot of MPEG-2 files). We hope for your understanding. The full version will support the decoding of this kind of audio after performing the necessary online activation.
I checked and it really is Dolby Digital 2 channel. So may be that's the problem with trial. Hope it works in full version. I'll try the voice with mov files.