maskededitextender not validate properly in network

Question

C#.NET 3.5

My date format is as below

FOrmation Date :

<asp:TextBox ID="txtFormationDate" runat="server" type="text" MaxLength="20" ></asp:TextBox>

<asp:MaskedEditExtender ID="MaskedEditExtender1" runat="server" TargetControlID="txtFormationDate" Mask="99/99/9999" CultureName="en-CA" MessageValidatorTip="true" MaskType="Date" InputDirection="LeftToRight" ErrorTooltipEnabled="True"></asp:MaskedEditExtender>

<asp:MaskedEditValidator ID="MaskedEditValidator1" ControlExtender="MaskedEditExtender1" EmptyValueMessage="Date is required" InvalidValueMessage="Date is invalid" runat="server" EmptyValueBlurredText="*" InvalidValueBlurredMessage="*" SetFocusOnError="true" ErrorMessage="*" ControlToValidate="txtFormationDate"></asp:MaskedEditValidator>

Dissolved Date :

<asp:TextBox ID="txtDissolvedDate" runat="server" MaxLength="20" ></asp:TextBox>

<asp:MaskedEditExtender ID="MaskedEditExtender2" CultureName="en-CA" runat="server" TargetControlID="txtDissolvedDate" Mask="99/99/9999" MessageValidatorTip="true" MaskType="Date" InputDirection="RightToLeft" ErrorTooltipEnabled="True"></asp:MaskedEditExtender>

<asp:MaskedEditValidator ID="MaskedEditValidator2" ControlExtender="MaskedEditExtender1" EmptyValueMessage="Date is required" InvalidValueMessage="Date is invalid" runat="server" EmptyValueBlurredText="*" InvalidValueBlurredMessage="*" SetFocusOnError="true" ErrorMessage="*" ControlToValidate="txtDissolvedDate"></asp:MaskedEditValidator>

 

//Compare these date 

<asp:CompareValidator ID="CMP_FD_DD" runat="server" CultureInvariantValues="true" 

ErrorMessage="Dissolved date must be greater than Formation date" ControlToCompare="txtFormationDate"

ControlToValidate="txtDissolvedDate" Operator="GreaterThanEqual" Type="Date" SetFocusOnError="true" ValidationGroup="BranchGP"></asp:CompareValidator>

when I enter the date as 15/04/2011 (Formation date) & 17/03/2012 (Dissolve date)

It works Fine on my own desktop But when I run it on Network by publishing website 

then it shows ERROR msg 'Dissolved date must be greater than Formation date'.

Plz help me.

still awaiting for your positive n quick reply