Error while creating Proxy for External Web Service using SE80

Hi,

For one of my client, We need to call an external web service from ABAP program. So I was trying to create a consumer proxy using the SE80 by passing the URL that was provided by the external service. But at the end I get this error message "Exception occurred in communication framework:Error in HTTP Framework:500Internal Server Error < URL>"

Are there any prerequiste that I should check before creating consumer proxy?

If so please list down the steps that I need to do.

Really appreciate the help and inputs.

Thanks,

Srikanth