XPRESS MUSIC HANerror of operation failed!!!

THERE IS A SEVERE PROBLEM WID MY XPRESS MUSIC HANDSET.. PREVIOUSLY, I USED TO VIEW A LOT OF VIDEOS ON YOU TUBE (CONNECTION IS AIRTEL GPRS)..BUT FROM LAST 2 DAYS IT IS SHOWING ERROR OF 'OPERATION FAILED' WEN I TRIED TO VIEW THE VIDEOS..NOW,IT IS SHOWING SUCH ERROR MSGS IN 95% OF CASES AND FOR REMAINING 5% ,IT IS PLAYING VIDEOS NORMALLY...MOREOVER, THE VIDEOS FOR WICH IT IS SHOWING SUCH ERROR MSGS HAD BEEN WATCHED PREVIOUSLY A LOT OF TIMES BY MYSELF..MY CONNCTION SETTINGS ARE WELL...