Mary:
This can occur if the DAO library that Access uses is not properly
registered. Try locating the file DAO360.dll on your system. Its normally
in
c:\program files\common files\microsoft shared\DAO\dao360.dll
Then from the run command on the start menu type:
regsvr32.exe "c:\program files\common files\microsoft shared\DAO\dao360.dll"
Note the quotes around the file path and validate that path for your system.