Pen drive issue with VF50

I’m using VF50 with windows CE 8 update to Ver 1.4 beta 1
I still have problem with pen drive (which isn’t seen at all). I had this probem with version 1.3 and I had thought this issue was solved with 1.4 beta 1 but the problem is still present. Nothing changes in “My device” pulling in and out the pen drive from the USB HOST. I’ve tried with 2 different USB pen drives

Do you use our evb? What is the filesystem on pen drives?

Thank, we have found the problem, it was connected to the board we used. The lines weren’t corretly made.
Now the pen drive works