Assuming it is connected to the USB bus, it is possible the ID is being reset due to power draw off the USB bus.
Try another USB port, or an externally powered USB hub.
Yes its USb In an external powered hub.
I had move it to another port trying to remedy the situation that got me to the point were if I left the sim and returned it would work eventually.
Before that it would not resolve
Do you think I need a new powered hub this one is 5 years old , is there somewear else i should look?
Thanks Rave