Connection Refused error in MDM ABAP API.

Hi ,

In MDM ABAP API, when I am trying to execute MDM_ACCESSOR_CONNECT function module it's giving me exception "EX_KERNEL_EXCEPTION"

Message ID: 00

Message Number: 001

NiRaw2ConnectError: Connection Refused.

I have done all the configurations in mdmapic transaction.

Can you please suggest any reason .

Thanks ,

Suchi.