USB interface not working on ReplayTV remote

[digitize]

I posted this problem on the JP1 Hardware forum with no response. So I am reposting it here so see if anyone else has run into this issue or has any idea of what to do.

I have a weird problem. I finally got my USB interface working. I can upload/download to an 8810W and also to a 15-1994. However I cannot download from the ReplayTV remote to IR401 ( I have not tried the reverse direction yet). I get this error everytime,

"The remote is not acknowledging data requests. (ErrNo=8, Addr=1024, Size=-1, Count="

I have changed to a set of fresh batteries on the remote and get the same error. If I use the parallel interface it works fine. I am using an extender on this remote.

What do you think is going on?

Thanks