Denon DNP-F109 seek problem

[winxi]

Hi,
I've a Denon DNP-F109 digital network player and play to it from MinimServer using BubbleUPnP as the control point.
When playing from MinimServer, it is not possible to pause or seek an MP3 file. When playing from proxified MinimServer (using BubbleUPnP Server), it works.
When I try to seek or pause with regular MinimServer, I get an 'action failed' error in BubbleUPnP and the MinimServer trace-log shows no related output. When doing the same with proxified MinimServer, it works and the trace-log shows some related output, please see the attachment.
The converation in this thread may be related to this problem.
Thanks!