What a stupid mess. Damn Microsoft to …
Access 2000 on a workstation wouldn’t access the back end files on another xp pro sp2 computer. This happened sometime between Friday August 10 , 2007 and the following Tuesday. It worked fine before the not at all.
The solution I got from Incognito at http://www.mcse.ms/message959052.html
To disable the warning start the Group Policy Editor (Start > Run, type -gpedit.msc- and press OK) and go to: -User Configuration > Administrative Templates > Windows Components > Attachment Manager- then set -Inclusion list for low file types- to Enabled and enter the file types you don't want to be warned about in the box (for example: -.htm;.exe-).
Thank you Incognito