Hi, I have a Iwatsu IX-5900, it has two red lights that will not stop flashing. The group 2 button and conference call (4th from the top and 6th from the top). I have deleted all voicemails; including, saved and archived, unplugged it, did key-combo -feature-#-8-(the flashing buttons individually, the flashing buttons together, and the voice mail button). Any suggestions as to how I can get these lights to stop flashing??