Plug [q] karbonn a15 dead

I DID SOMETHING WRONG WHILE
UPDATING MY KARBONN A15 FROM ICS 4.0.4 TO JELLY BEAN
FIRST IT HANGS ON ITS LOGO
THEN IT WONT START ANYTHING
ONLY DISPLAY "Qualcomm HS-USB QDLoader 9008"
I FOUND ONE PROCEDURE HERE QPST
I FOLLOW ALL THE PROCEDURE BUT IN LAST
IT WILL DISPLAY AN ERROR COOKIE(IF PRESENT).......
SOME BODY PLZ HELP ME
TO RECOVER MY DEAD KARBONN A15