I had the same problems a while ago using a Dazzle Fusion A2D converter. The bundled s/w worked fine for capture but Premiere didn't. It is simply the case that Premiere does not nbatgively support analogue capture, simple as that.

I suggest you simply do what I did. Capture to AVI using the bundled s/w. Forget the fact that editing s/w may have come with it as well and import the AVI assets into your Premiere project.

Given that I was starting from VHS tapes I consider my results more than OK as a way of converting them to DVD.

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