I've added a MaskedEditExtender and a MaskedEdtitValidator for date formatting in a MM textbox for a date field. But now the databinding isn't working. Databinding does work when the MaskedEdit controls are removed. Are there any known issues with using MM.Net and the AJAX Control ToolKit?

Here's the markup for the controls:

<mm:mmTextBox ID="txtVisit" runat="server" Width="68px" BindingSource="Visit" 
BindingSourceMember="VDate" 
DisplayFormat="{0:MM-dd-yyyy}" 
AccessLevel="Full" 
ControlID="00000000-0000-0000-0000-000000000000" 
IsPostBack="False" 
SecuritySetup="True" 
UserFieldName="">
</mm:mmTextBox>

<cc1:MaskedEditValidator ID="VisitDateMaskedEditValidator" runat="server" ControlExtender="VisitDateMaskedEditExtender"
ControlToValidate="txtVisit" 
Display="Dynamic" 
EmptyValueBlurredText="*" 
EmptyValueMessage="Date is required"
ErrorMessage="*" 
InvalidValueBlurredMessage="*"
InvalidValueMessage="Date is invalid"
Width="1px">
</cc1:MaskedEditValidator>

<cc1:MaskedEditExtender ID="VisitDateMaskedEditExtender" runat="server" 
CultureAMPMPlaceholder="AM;PM"
CultureCurrencySymbolPlaceholder="$"
CultureDateFormat="MDY" 
CultureDatePlaceholder="/" 
CultureDecimalPlaceholder="."
CultureName="en-US" CultureThousandsPlaceholder="," CultureTimePlaceholder=":"
Enabled="True" 
ErrorTooltipEnabled="True" 
Mask="99/99/9999" 
MaskType="Date" 
TargetControlID="txtVisit">
</cc1:MaskedEditExtender>