Connect oData Service with SAP Web IDE - No Alias error message in browser

Hey guys,

i tried to connect the SAP Web IDE with my SAP Backend Services. So i create an Service in SAP and connect the destination for this service in SAP Web IDE. But my problem is, if i open the servce url outside from sap in a webbrowser, i get the following error message:

But if i test this service within the SAP Gateway, the service works well, and their is no alias missing.

Have somebody any idea about issue?

Best regards

Patrick