Invalid class string error



Hi. We're getting this error from an ASP app on an XP Pro system,

Server object, ASP 0177 (0x800401F3)
Invalid class string
/working_dbase/mathlab.asp, line 158

It's blowing up on the line where we instantiate an ADODB object (please see
below). The code runs fine on various other machines but bombs out on this
box. We've played with permissions to no avail. The IUSER account has List +
Read + Execute permissions. We even granted full control to Everyone. Is
there a way to reinstall the ASP engine on that machine? Your help is much
appreciated. Thanks.

Set objConn = Server.CreateObject("ADODB.Connection")
objConn.ConnectionString= "Provider=Microsoft.Jet.OLEDB.4.0; Data
Source=C:\data\mathlab.mdb;"
objConn.Open


.



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