I've tried several options to correct my misbehaving cordless. Model is: M-RGB112. Naturally, replaced my batteries. Tried resetting. Reconnected the desk-top base. Still misbehaving. Couldn't find a download for this specific model. Closest model they have is the LX6 Cordless Optical (looks most like mine), but for model M-RCF112. Not my specific model. Any suggestions? Thx!