I often use Contribute and it's a royal pain. Has she tried re-connecting to the site? By that I mean in Contribute tell her to go to File>>My Connections then have her select the site (if there's more than one). After which she can go through and adjust the connection settings. Without having the login info and being able to see what errors she's getting that's about all the help I can give. Also, what's the URL for the site? Maybe I can take a quick look.