Polhemus FasTrak Error Message

[JB_HP_Viz]

I get the following Error message in Vizard 5 Beta 4 when I try to connect a Polhemus FasTrak via USB
** ERROR: Failed to connect to a FasTrak: S : Device not found
** ERROR: Failed to create extension sensor with polhemus.dle

I tested the same Polhemus FasTrak via USB under Vizard 4 and it looks to work fine:
polhemus.dle Polhemus Extenstion
1 station(s) detected
** NOTIFY: Connected to Fastrak over USB Connection

I was able to connect a Polhemus Patriot correctly using Vizard 5 Beta 4

Has anyone tested a Polhemus FasTrak via USB with Vizard 5 Beta 4?
Any idea what the issue might be?

Thank you

John