Provider Web service

Hello, first off i would like to thank you all for looking at my post.

I have an issue with a web service provider scenario, the issue is the client is using the web service to access my system to gather status on shipments that have been shipped. Am i going in the right direction is saying that I should be the provider? another issue is when i step through my process i see that the data is not being passed in the reponse document that it should be mapping to. Help would be great