Validation mishap

Hi,

This works only if there are other errors that are being flagged to the user. If it is the only error then the report gets submitted. Why?
Thanks,

Bandit
<%

if CDate(Request.Form("VisitDate"))> Date() then

%>

<tr bgcolor="#cccccc"><td bgcolor="#ccccff"><b>Enter new Visit Date - you cannot forward date a report</b></td>

</tr>

<% end if %>