Based on the information provided in this circumstance I would suggest using the Sony Ericsson Update service software as this may fix the issue it will update the firmware as it sounds like it is corrupted.
If you cannot do it yourself take it to a sony service centre and they can updated for you
Laki, November 2009
i have also the same problem please help me!!!!!!!
please send a mail to paki000hotmail.de
O.m, June 2009
Hi,
Did you get any answers to this problem at all?