I have had a x10 ps561 system for 5yrs now and have had problems with my front door sensor, i have two door sensors, one for the front and one for the rear slider door, and have had no problem with the rear slider in all those years, i also have 3 motion sensor two on 1st level and one on 2nd level all work fine but the front door sensor just stops working, i have replaced sensor 4 times plus replaced batteries will register and work for a day then panel will start blinking in that zone after that and i will have to redue everything again, i am using the ds10a sensors, should i try the newer one!