Integration Broker Response20915

Integration Broker Response20915

Integration Broker Response209150No rows exist for the specified keys. {CI_xxxx} (91,50)xx Integration Broker Response209159Failed to get the Component Interface.

I have created a web service using provide web service wizard. Other person trying to implement the service using .net getting this error in one instance, another instance it works fine.

i hav tested the CI and it works fine in all instances.

What could be the probleme?
Thanks in advance....