Please check in transaction SICF, if service: /default_host/sap/bc/webdynpro/sap/agstwb_ce is activated. Please expand for this the tree via "/default_host/sap/bc/webdynpro/sap/" and activate then the node "agstwb_ce".
After activation of node "agstwb_ce" select "test service" from context menu of this node.
What happens then?
Christoph