DateTime fields in SQL Commands

[wmopnc]

Instead of adding tables to my report I've added a command. I'd like to add parameters to the query for the command. When it comes to strings everything is fine. Its dates I'm having problems with. For example:

SELECT name, EndDt from tlb_Name where EndDt <= {?EndDt}

When I try to save the command I get a syntax error or an access violation.

Thoughts?

Thanks in advance.