Date validation does not work?

I have two forms that manipulate a SQL Server database. One form creates/adds new records and the other updates the records. Each form has validation for the date fields. The form that creates/adds a new record works well and will give a message before submitting if the dates are entered in the wrong format. the code sample is:

<cfinput type="text" name="AssmApproveDate" message="Date must be mm/dd/yy format" validate="date" pattern="mm/dd/yy" value="" size="8" maxlength="8" tabindex="4">

The update form has the date values populated from the database. If no date changes are made the submit will work fine but if a wrong date format is entered or a date changed to a wrong format the validation does not work and the form is submitted resulting in a CF error for the stored procedure on the processing page that states that a the value can not be added to the DateTime field. Here is a code sample on this form:

<cfinput type="text" name="AssmApproveDate" message="Assembly Approval Date must be mm/dd/yy format" validate="date" pattern="mm/dd/yy" size="8" maxlength="8" tabindex="4" value='#DateFormat(Select_record.AssmApproveDate, "m/d/yy")#'>

Any ideas why the validate will not work on this second page?