user account not shown in safe mode

when booting into safe mode my account is not shown. there are 3 user accounts and the administrator account,but only the administrator and one oof the other accounts are shown.all 3 user accounts have administrator privileges. i am unable to get to the my documents folder on my account through either of the available accounts.  access is denied when trying to open it.  also the icons are quite large on the login page.  is this a resolution issue? how can i return the icon for my accountt in safe mode. it was there previously? I need to acces the account to delete a problem file that wont delete normally.  it says in use by another person or program, which it is not as far as i can tell. it also will not display properties.  right click and choosing properties results in no display of properties. spybot, adaware, mcafee and avast don't show anything when scanning it. anyone with any suggestions would be appreciated.  I'm more concerned with the account access issue than the file, since I can always just drop it in the spybot shredder to get rid of it. running SP2 on Windows XP,dim 2400, intel onboard graphics controller 82845g/gl/ge/pe/gv, with graphics driver ialmmt5.dll.  thanks in advance for any suggestions.  jim