wifi issue please help me :(

I have WiFi at my home. Until a couple days ago I had no Issues using it. now my phone will connect to WiFi but when I try to load an internet page if use an app requiring internet it does not work. I spent a couple days searching for what could be wrong with my phone and double checking all my settings. Today while out with some friends my phone notified me it had found WiFi service. I connected to it and opened the internet browser and it worked. Then I realized the problem is most likely with my home WiFi and phone together. My mobile data works fine. I was wondering if anyone knows why this would happen. My dad checked the WiFi and said there are no settings that are set that could have that affect. The WiFi works on his computer also. So the problem must be between my phone and that particular WiFi. Any suggestions or ideas would be greatly appreciated. Thanks!

I have similar problem.  My setup is
 Android version 2.3.3
HTC sense version 3.0
Software number Virtuous Unity v. 1.31.0 (inspire)
Kernel version 2.6.35.13-Virtuous-sense- v. 3.1.0 + rmk @droid #8
Baseband version 12.28b.60.140 eU_26.03.02.26_m
Build number Virtuous Unity v 1.31.0
Browser version Webkit/533.1

Tried searching forum but no answers