How to enter a date parameter in Debugger

(This is prob. a really dumb question but it's driving me mad!!...)

I am using the Debugger in SQL Query Analyzer & want to set the value of a datetime parameter prior to executing the stored proc. The "Debug procedure" window allows me to specify the parameter values - but I can't get it to accept a datetime. The language is us_english & I've tried most ways if specifying the date - 01/02/2004, with/out quotes, 02 Jan 2004, as a full datetime, swapping day/month values etc etc. The procedure always fails immediately with: Invalid character value for cast specification.

Thanks.Got it ... finally!

yyyy-mm-dd

Argggggh.