Ipad and Iphone 4 will not stay connected to the wifi
when my ipad and iphone 4 go to sleep and i wake it up, it says im connected to my wifi network but nothing will load from the internet. i have to turn the wifi on them off then back on to connect up to the internet. im gettin really frustared with it now. I think its a setting on my router thats causing this but ive no idea what to look for. ive tried changing the wireless channels etc but i dnt know what else it could be?? please someone help!!
iPad, iOS 4.3.3