Apple iPhone 3gs Wifi issue

[devilshouldcry]

Hi
I Have iPhone 3GS 3.1.2 with baseband 05.11.07 just 10 days old from Orange UK. i have strange Wifi issue. When i bought and before jailbreak wifi was working perfectly. First i tried to jailbreak with "blackra1n" i could not jailbreak it then i restored official firmware in DFU mode. And "make it rain" jailbreak successfully and unlocked with snow. But now when i use my wifi it connects, transfer some data and then give error on browsing that
"Cannot open page safari could not open the page because the server stopped responding"
When i enable and disable wifi again, It again start works but for very short time of period and data.
Enabling/disabling/network reseting/restarting could not solve my issue.
Any help from iPhone gurus?
Thanks in advance!

[Fraser1983]

Hi. Try disabling 3G under network settings, reset network settings. Reboot. Connect to your wifi network Then if all is ok, re-enable 3G.
Try that, hope this helps. Good luck! :-)