I have some imagistics offlease 4511 copier that have scan on them but they didn't come with the CD to install scan. when we tried to set up with 450 sharp it is asking for a username and password. any one by chance have an imagistics drivers for scan or possibaly sharp 455 as it may work also. the scan user code is on the back of machine for reinstalling scan when we dial into the copier internal wed page it ask for a username and password. the 4510 or 450 never asked for this. any help please