Help needed for accessing java stateful webservice....

Hello,
I am trying to use a java stateful web service in asp.net (BookStore web service given in samples of jax ws).
I could get the first web service by calling
BookStore.BookStoreService bs = new BookStore.BookStoreService();
But when I call bs.getProduct("dfd") it returns BookStore.EndpointReferenceType in asp.net.
I am not able to use this BookStore.EndpointReferenceType in asp.net to call further methods.
Please let me know what else I need to do?
This is a problem specific to stateful web services in java.
Any help would really be appreciated.

I couldn’t find any help related to accessing java stateful web services in asp.net.

Thanks in adavance,

Milind.