CAL SAP BW7.5 http error - page cannot be displayed

Hi,

I created an instance for SAP BW 7.5 SP01 and HANA SP10 (developer edition) on AWS. Everything works fine except if I want to display query results in Eclipse within BW-MT. I get error that page cannot displayed. It's trying to get a request from server *.wdf.sap.corp which seems to be wrong. Same request sending to *.dummy.nodomain works fine. How can I change the path in Query Designer in Eclipse not to call wdf.sap.corp but dummy.nodomain? I tried to change it in RZ10, but without success,

Regards,

Jürgen