Hi all, I still have the same problem. As Monica asked me, I asked for help at Freescale technical support, and explained the same question on "the drag on toll bar" File "Fsl: winUSB_V2.dll". But they replied that they only support their software, which for them in this case is "CodeWarrior" and C # do not support. The irony is that, Freescale manufactured the file. "Dll" and if you seek help in support for C # anyone know of any other libraries or interface for being apply on Freescale technology. Someone already resolved this problem, I would be very useful your help, thanks in advance.