I looked up a cable on ebay for your phone. Here is the link. http://cgi.ebay.com/USB-DATA-CABLE-C...QQcmdZViewItem
It lists the VX6100 as well as the VX7000 as compatible. It looks like you have the correct cable for your phone. You can try removing the battery from the phone to determine if the cable can power your phone properly. I know I have one such cable for my Samsung A570 and it can charge or power my phone from usb. Compare the voltage output of your charge to USB voltage ( 5 volts ). If there is much difference it could be the problem. If your adventurous you can try disconnecting the power wires from the cable. Just one wire being dissconnected would be nessesary I believe. You can cut the cable open and cut the red wire. This will prevent the cable from charging your phone. Hopefully this will fix the issue. However, you may just have a faulty cable. I suppose it would be wise to request the seller to send you another cable since the one you recieved hasn't worked as advertised.