U-PHORIA UMC1820, USB Problem


by Arc4


I have ugraded from UMC404HD to UMC1820, but I have  a problem with my UMC1820 it only communicates with my laptop/pc when it likes. Most of the time it'll give me a message that say no device connected. I can't really work with this device because I don't know when it'll be seen by the pc. I dont have the same problem with the 404HD it just clicks with the pc, when I try to swap the USB cables still the same problem with the 1820. 

Please help !