Ashley,
Did you join the cycling group with the same email address and Yahoo ID? If so, then you are actually using the right username and password at work. Look around that page and see if you can find a link that says "My Groups". The user name and password you use for all the Yahoo groups (whether cycling or YLD) is most likely the same, unless you signed up using two different Yahoo ID's, which you probably did not.

Let me know what happens.

Kitty