Sony ericson wsod

I HAVE SE K810i. I HAVE WHITE SCREEN OF DEATH PROBLEM. AFTER GOING THROUGH MANY WEBSITES I CAME TO KNOW THAT I HAVE TO UPGRADE EROM. I USED KKCLIENT. I FOLLOWED ALL THE SAID STEPS. BUT KK CLIENT DISPLAYS THE FOLLOWING ERROR
Press "5" and "2" keys, hold them together and plug DCU60 USB cable.
Phone Connected...
Detected: DB2020 Series
Flash ID: 0x897E - Supported
Error: Unsupported CID (>52) Version!
Contact With Reseller.
PLS HELP.