If you're having issues with date formats, the sloppy fix (but works well) is as follows:
SELECT *, Day(SeminarDate) as SeminarDay, Month(SeminarDate) as SeminarMonth, Year(SeminarDate) as SeminarYear FROM tblSeminar WHERE SeminarDay = 18 AND SeminarMonth = 2 AND SeminarYear = 2006;
It works...