Access data in SAP Rest Service

Hi all,

I have the problem about using SAP Rest Service to get data from SAP backend system. The REST url that the SAP Team send to me "http://xxxxxxxx:8004/sap/opu/odata/sap/ZGSSPBP_SRV/" This url contain a collection "CoAList" and it work fine when I load in the browser.

I try to use Visual Studio.NET to build external content type based on this REST url but I get the following error :

I have checked in many post and have no right solution.Please help me to resolve this.

Regards,

Phuong