ounce have done the software upgrade to 6.1 you need to reset both tiu n remote back to factory specs, then try to make them work again ok! also you should buy the DCS companion it's an excellent book for dcs problems written by Barry. you can download it to thumb drive or buy book if they sell it still since Barry has Passed! you might be able to buy on amazon!
The DCS Companion 3rd Edition: Broskowitz, Barry: 9781517374396: Amazon.com: Books
Alan