Hello,
I did have the same problem with the USB B to B male/female connector.
I wanted to use the PSU with an Hiface and an HRT MS II.
I contacted AQVOX and the problem is that both devices need a common ground between the computer and the device. (only the +5V connection cut)
I think that the USB A to A male/female PSU specially made for Hiface will solve the problem.
You have to precise common ground in your order to AQVOX.
Regards