I've had wifi in my house for years. As I type these devices are connected: ps3, desktop, laptop, wife's iphone. Everything works fine. I walked in the house with my Captivate and it can't obtain an IP address. The password is right. It gets to "Obtaining IP address" but then it says "Unsuccessful." I have never ever had a device issue connecting to my wifi. Numerous family/friend phones have connected without a glitch. Any ideas?