Metacube-Problem user-defined parameter

Hi, I use Metacube 4.0 and have a problem with getting user-defined parameters value. In Agent, I created a parameter DayZero defined as : select p.day_ofmth from date_dim p where p.date_key=1this should return a number (only one row).Also, using dbaccess, I ran DayZero query, it works fine and returns the right value. In explorer, I use it in a filter: DateKey = <<DayZero>> (this filter should be more complex, but since it doesn't even work with this definition...) When running the query, the following error messsage pops up: MCExplorerBookCTRL: There was an error (-2147417848);MetabaseCode - GetQueryParameters: Automation Error I checked on the server side: the DayZero executes and ends, but nothing else. Metacube is new for me so I guess I am doing something wrong. Any idea?? Thanks, Sebastien Sent via Deja.com http://www.deja.com/ Before you buy.