Hi Roy
you should be able to export the file either through compressor or quick time. if you are using compressor export the file as DV Pal or 8bit uncompressed or what ever format you choose, if your using quicktime choose current settings and export that way. the lacie drive shouldn’t make any difference.
i’m not sure if the format of the drive may be causing a problem i.e mac to PC
hope this helps
Nick