DAO.msi

If i run SW alone, withoutanyadd-ins enabled it runs fine, but as soon as i startenablingadd-ins i get a prompt to locate "DAO.msi", which icannotfind on my system.  i found a thread online about asimilarproblem and a zip file containing that file, however, if idirectsolidworks to that folder, it doesnt recognize the file. hasanyone else experienced this?  
SolidworksGeneral