Date validation doesn't work!

Hi there!
I am using 'dd/MMM/yyyy' date format to display dates. I have two server textboxes namely 'txtfromDate' and 'txtToDate' which have values '12/Oct/2002' and '17/Oct/2002' respectively.

<asp:CompareValidator id="vDates" runat="server" ErrorMessage="Invalid date selection!" ControlToValidate="txtToDate" Type="Date" Operator="GreaterThan" ControlToCompare="txtFromDate"></asp:CompareValidator>

The above validation control always shows error messages irrespective of what value present in the date fields. Can you tell me where I went wrong?

PS: If I use the default date format[MM/dd/yyyy], its working like a charm. So Validator control don't know other formats? :confused: