Script running against Management node instead of SQL Resource name

We have a 2 node W2k8R2 Cluster. A 2008r2 SQL cluster. SCOM 2012 R2 agent is installed on the Nodes.

A SCOM DiscoverSQL2008DBEngineDiscovery.vbs script runs every 4 hours. Problem is the instance and DB are not discovered. After hours of troubleshooting i found the source of the problem.  This script is running against the management node instead of the SQL resource name(SQL Network name). I didn't found issues on the net about the discovery script. But I don't know if this is a cluster configuration issue.

Thanks