Hi I tried that did not work for me but did ring bt they say base unit is broken try buting just anothe base unit onnline google
rrrr, June 2012
This is so annoying, but I think I just worked it out. See p.27 of manual, 3rd para in margin. It tells you to press & hold down the 'rewind skip' button on the base, until it says 'message alert off'. Hope that solves it!