besides that, i had a problem with my vivaz...can any1 help me out?

i updated my vivaz with the sony ericson update...
before i update, the GPS receiver are great and fast detection.
after i updated my phone, i noticed the gps are not working well at all...all the bar show in grey colour & show "GPS work poorly indoor & enclosed area".

can any1 help me out what to do?
i have tried the purge GPS data...

what can i do besides from that?
quick solution needed due to heading to somewhere and GPS needed.

thx

omg...then what to do now?
install the previous firmware?

the most unsatisfy was after updating it, seems that many things getting more serious...zzzz

come come come, vivaz user here, can u all direct me to any full guide of installing GPS which functionable? thx