upgrade problem

[m.z.s]

i did once upgraded my 2g iphone 1.1.4 to 2.0 by mistake and it happens that since then having problems with my wifi....i can see the address and have my wifi status not connected while trying to connect nothing barely it locks...than i reinstalled the 1.1.4 but keep the same problem i even lately used the Qiuckpwn to use the v2.1 it worked for a while than same thing i can see the address but not connecting ANY HELP ASAP pleaseeeeeeeeeeeeee
ALL I GET NOW
could not activate cellular data networkdp authentication failure

although it sometime works but really rareeeeeeeeeeeee

[marys25]

Having the same problem... My phone was acting buggy and when I went to jailbreak it quickpwn wasn't workng for me... And the firmware was downloading like a .rar file