Xperia mini pro Wi-Fi problems

[#1]

Hi! i have an Xperia mini pro. The wifi was working fine for the first 3-4 months, but now it doesn't working correctly. After some minutes, using the phone, the wifi doesn't work, but it stays connected. I tried it with several wifi networks (protected and not protected too) and I tried mac filter but it didn't work. I did a repair update but it doesn't working. Please help! Sorry for my bad english. (I'm using 4.0.2.a.0.62, i can't update too ics yet)

[Uliwooly]

repair your phone with SUS or PCC

Update Service (SUS)

http://www.sonymobile.com/gb/tools/update-service/

http://www-support-downloads.sonymobile.com/Software%20Downloads/Update_Service_Setup-2.11.12.5.exe

Alternatives on How to backup Xperias

http://talk.sonymobile.com/thread/36355

Don't forget to mark the Correct Answers & Helpful Answers

[#3]

I tried it with PC, now i'm going to try with SUS.

[#4]

It doesn't working now too.