How to use HTTP destination in BPM to connect to Remore server UI5

Hi Experts,

We have a scenario where BPM process is one server and SAP UI5 is on other . We have created HTTP desination from BPM to UI5 server as per below SAP HELP. but at runtime the placeholder is not replacing the URL to point to remote server. We have used curly brackets as described.

http://help.sap.com/saphelp_nw73ehp1/helpdata/en/75/5af4cc186441009a75fd660adc0617/content.htm