[closed] How to query RTC programmatically based on the status of workitems

I am trying to create RTC query programatically using the plain java APIs based on different attributes of workitems like projectarea,workitemtype,category,createdby.
Querying RTC based on all the above attributes works fine but when I query based on status value of the workitem like "New","Open","Closed",the query always returns 0 results

Does anyone have an idea about how to form a RTC query based on the status attribute?
Many thanks in advance for your answers