I have a strong 3G signal in my area and was using it on the Droid. I decided to try to connect to my home network which I did with no problem. The Droid was on my WiFi network for about 15 hours. I decided to reconnect to 3G so I went into "Settings" and turned off "WiFi" which used to make the Droid automatically reconnect to the 3G network but now it does not. I can not reconnect to the 3G network after being on WiFi. What can I do?