iPod touch 4g 4.3.3 wifi problem after jailbreak

I got iPod touch 4g.version 4.3.3 is being using.i did jailbreak last night.every thing is goin good,except wi-fi.before doing jailbreak,there wasn't any problem at all with wi-fi.but now it is showing that wi-fi is connected but,my safari is showing that net ain't connected..here's the screen shot



please help me.i hve done with network reset finc.didn't work.now what else i could do to fix this problem?? HELP ME GUYS..

 

but there so many around us r using wi-fi on their jailbreaked iPod touch 4g.so a solution to get rid out of this problem exists.nd i want to know that buddy.so please help me..