this is driving me nuts! Hopefully someone here can help..

When i activate my WIFI for the first time it is insanely fast, but as soon as i want to redirect to another page it becomes laggy. The load bar will just stick at a quarter length for almost a minute and then load. I have tried uninstalling and resetting my router but nothing. I then installed a wifi helper app from the market and that initially helped but now keeps alerting me that the wireless access point is unavailable. wth is going on? this is my third droid and each time i get one there seems to be something wrong with the damn thing. I love this device and really don't want to return this one as my previous two used the wifi network flawlessly.

any help would be appreciated