Medi-Cal and Mental Health Network

I'm paneled with Medi-Cal in California and in my area they currently use a third party agency, the Holman Group to handle their claims.  The Holman Group states that they don't take electronic claims but SP seems to indicate that this is possible.  Have any other providers that work with the Holman Group been successful in electronically submitting their claims via SP?   

Just got paneled with Managed Health Network and am also wondering if people have successfully processed claims via SP.