printer authenticating with another user account

Hi

I have a bit weird printer problem. Recently we had one of our IT guys leave so obviously we have had to disable his account.

Ever since then we have had a few people who can?t print, it says access denied. So I deleted the printer and tried to add it again via UNC and then it prompts for the former IT guys credentials, when it should just be using the person who is logged on, automatically

So my question is there anyway I can stop it from using the other user credentials and just use the logged on user? (Before anyone asks yes the users who are having this problem do have rights to this print server)

Cheers