Problem with iphone 2G's WiFi

[khalloooz]

My WiFi doesn't make scan for network off/on doesn't scan rest network setting & all setting Nothing change my Restore 2.1 upgrade 2.2 downgrade 1.1.4 but on 1.1.4 the WiFi make along scan but didn't see any networks ...
yesterday i downgraded to 1.1.4 jailbroke by Ziphone and upgraded to 2.1 Jailbroke by quickpwn and the wifi see my home network but just 5 minutes it lost the network and didn't see it again till i rest my network setting it connect again but the same thing and suddenly the WiFi didn't make scan again ...
i'm gonna be crazy .........Help me please