Manually created distribution lists not working on new pc

[havenlad]

I have a user who has created several distribution lists on an old pc. She
had the pc refreshed and on the new pc , the distribution lists appear, even
with the email addresses of the people on them, yet when she selects them to
send email to, the GAL does not recognise the lists. I could understand if
the distribution lists had disappeared, but when you open them, they have
obviously stayed on the server (Exchange 2003) as all the details are there.

Weird.

Thanks