querying sql reporting services 2005 with a web service

Hi I am using ssrs 2005 and I have created a webservice.The webservice has a typed dataset(.xsd file) and I have a couple of methods with parameters used for displaying in the reporting services. After creating the shared data source,the error occurs when I try to create a report which queries data from xml web service. I hope this is clear. Can somebody let me know how to resolve this issue? krishna