I am very frustrated by the frequent wireless signal drops I am experiencing. I cannot maintain a constant signal via wireless for more than 15 minures. I do not have the same issues with 3G nor with other computers getting a signal from my access point. I am no more than 15 feet away with a clear line to the access point. Has anyone figured out any iPad or router tweaks to improve this? I have turned off auto brightness but that didn't help.