surfing error..

[br007]

Authentication via the proxy server was unsuccessful.

Due to unknown reason i am getting above error msg. while browsing ,my 3G network is " idea" ,and i am using sony xperia walkman ,Pl.help promptly

b v raval

bhrajehr@yahoo.co.in

[Uliwooly]

Double check the APN settings 

Settings > Xperia > internet settings 

or 

Manually

settings > more > mobile networks > access point names > menu > add new > enter the info > menu > save