One thing you can try is to unplug it and take the batteries out of the hand set and leave everything for half an hour or more,it may reset it back to normal.It's a bit like restarting your computer after a download,it might do on good but worth a try,if I remember right you shouldn't leave the handset plugged in all the time(leave it out of the base now and then).Good luck.
Rich
March 2011