Domain Mapping problems with lost password?

Hi There,

if a client of my network lost her password and wants to get a new one everything runs well until the point where the customer needs to click on the link within the email to refresh the password.

If they click on the link you get to the same wp-login.php?action=lostpassword page with the notice

This key seems to be wrong
.

Could that be a problem of the domain mapping plugin as it all works well if you do it from the main site (and domain).

Thanks for your support,
Tee