xolo a500 qualcomm

I have one xolo A500 stuck on xolo screen.
It has qualcomm processor. I tried with "Xolo-A500-S013-2013-01-30-(by_xdafirmware.com)" software but it always says phone not found.
Drivers also installed. Mobile detects as android device on computer.
How to flash it?
Any body has any idea about this mobile flashing?