Why don’t you repair your Office installation using Control Panel?
If that does not work, I suggest you to install the last MDAC 2.8 file from Microsoft (http://download.microsoft.com/download/1/a/4/1a47382d-18f3-41d4-b92c-74db27d5944b/MDAC_TYP.EXE)

Hope this help. 8)