Amit, This article, and also article
Amit,
This article, and also article in following link:
http://www.ssas-info.com/analysis-services-articles/54-reporting-services/1527-using-date-parameters-in-reporting-services-reports-built-against-data-cubes
provides step by step instructions how to use SSRS calendar control with SSAS. It works, just follow instructions precisely...