Quicktime error 0

Hi,

I'm trying to export a video that I sent from FCP 6 to compressor and every time it says Fail, QuickTime error 0, I don't understand I've tried with different compression settings, DVD Best Quality 90 minutes, 120 minutes, Fastest encode 150, 120... all with the same result, Failed and when I look in the Batch Monitor it only says QuickTime Error 0.

Anybody knows what could be??

thanks

Javier