hi, thanks for your replies. yes the VS vapes as it should.. when i plug it the pc says "usb not recognised" the one computer (of the two) is my standard one which i ve been using escribe..the other is a newly installed i dont have the original cable but with both of cables i was updating the vs regurarly, so they are not charge only cables. i made reboots etc...is there anyway of hard resetting the vs? (or in general dna200?) should i send it to evolv or vs?