Help Wifi connection problem

[Thiss]

Hi,
I bought GS2 and tried my home wifi, it stated connected, but didn't work. On my Iphone 3G works fine. Then I tried my friend's wifi on GS2 and it worked, so now I'm confused, where is the problem. My wifi router is D-Link DI - 524 (802.11g), so it should be compatible.
Thx in advance

 

[Slug]

I've seen a few reports of issues connecting to D-Link routers and APs; check their support site for a firmware update.