Should iMovie11 be able to import VCR tapes using Canopus ADVC-100

I think the answer is yes. However, in my case there seems to be a hiccup. The Canopus screen opens okay and import commences, as confirmed by the red light in the timer recorder and the time running up. Unfortunately, importing stops at 2 seconds with manual input selected and 1 minute with automatic selected. From the saved events, the manually imported DV file will not play because of its insufficient length and the automatically imported one plays back for the 1 minute. I have checked the settings and connections and all are okay but something is awry.

A forum search appears to say the ADVC-100 and iMovie 11 are not compatible but the fact that 1 minute of tape can be transferred successfully suggests iotherwise.

Are there any suggestions on what may be at fault ?