USB Problem-Cannot Comunicate

Hi all!!, im working in a sample to comunicate to the UART and it works just fine, but im having troubles to comunicate to the USB port. First i downloaded from the main page the USB drivers, but when i connect the module to mi PC with the USB wire it doesnt do anything!, the PC doesn´t aware of its existance. Finally, when i try to run the downloaded USB application an error message appears saying “The USB driver are not installed”. Does anyone knows if its a hardware failure?.

Thank you so much for advance, i hope you can help me!.

Have you checked the AT+WMFM command to enable the USB… :question:

probably another one for the FAQ: viewtopic.php?f=7&t=3766&p=14703&hilit=FAQ#p14588