HTTP_GET - Port 80 error: NIECONN_REFUSED

Hi Experts,

I'm extracting data thru FM HTTP_GET, It is working fine if I provides the RFC destination as SAPHTTP (which runs on front end).

But If I provides RFC destination as SAPHTTPA (which runs on App.Server) it is giving Error as follows.

'Connect Error: Connect to Host inpt.co.uk Port 80 error: NIECONN_REFUSED'

What would be the problem?

Requesting your help.

Thanks.

Abhishek