Microsoft OLE DB Provider for ODBC Drivers error '80004005'

Hvad gik der galt her.
Den kommer ed følgende fejl.

Microsoft OLE DB Provider for ODBC Drivers error '80004005'

[Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified

/link/addurl.asp, line 71
det er denne linie my_Conn.Open ConnString


set my_conn= Server.CreateObject("ADODB.Connection")
        set rs = server.CreateObject("ADODB.RecordSet")
        my_Conn.Open ConnString
        set rscheck = my_conn.Execute ("Select URL from link2 where URL='" & URL & "'")

Jeg connecter med denne linie i linie 40
Conn_String = "DRIVER={Microsoft Access Driver (*.mdb)};DBQ=" & Server.MapPath("../database/link.mdb")