Thanks for the help. That seems to have done the trick!

I have a problem with the memory on my Beocom 6000. The problem is that I had one of my 6000's (no.1) stolen (along with the original base) and the other one I have (no base) (no. 2) has numbers on it that I want to delete. I had to buy a new 6000 (no.3) with base but when I try to delete the numbers on the original 6000 (no. 2) the message I get