HOW COME I ALWAYS GET MY "REPLY TO ALL" ON THE R-390 REFLECTOR KICKED BACK AS "UNDELIVERABLE"? PERHAPS I AM DOING SOMETHING WRONG, LIKE NOT FOLLOWING PROTOCOL! DO I NEED TO "SIGN-IN" BEFORE RESPONDING TO THE GROUP? WHAT GIVES? I KNOW IT MUST BE SOMETHING SIMPLE! 73, GLEN GALATI, KA7BOJ Tacoma, WA. eldim at att.net