How to set up PuTTY to a BCM50

[bobbychorlton]

Hi,

I'm trying to connect to a BCM50 using PuTTY.
1 I provide the IP address
2 Putty connects
3 Putty pops up a warning about the identity
4 I accept the certificate
5 BCM presents a prompt
login as:
6 I reply with a valid admin userid
7 Putty ends with "No supported authentication methods left to try!" and finishes

What else do I have to do to get it to work?

Help!
Bob