My ado connection to the database fails.

<cfobject type="COM" name="obConn" class="ADODB.Connection" action="CREATE">
<cfset a = obconn.open("#attributes.datasource#", "#attributes.username#",
"#attributes.password#", -1)>

I get this error:

An exception occurred when executing a Com method.
The cause of this exception was that: AutomationException: 0x80004005 -
[Microsoft][ODBC Driver Manager] Data source name not found and no default
driver specified in 'Microsoft OLE DB Provider for ODBC Drivers'.

Any one who knows what is wrong? It used to work before we upgraded to cf mx