I have some problems with Maskedit extender & validator...

 I have this code, can anyone tell me why when i put a valid data (just numbers) when i go to another textbox it tells me that the ( * Numer is invalid )

<asp:TextBox ID="txtCPF" runat="server" />
 <ajaxToolKit:MaskedEditExtender ID="meeCPF" AutoComplete="False" ClearMaskOnLostFocus="False"
            InputDirection="LeftToRight" Mask="9{3}.9{3}.9{3}\-9{2}" MaskType="Number" CultureName="en-US"
            MessageValidatorTip="true" UserDateFormat="DayMonthYear" TargetControlID="txtCPF" runat="server" />
            <ajaxToolKit:MaskedEditValidator ID="mevCPF" Display="Dynamic"
            ControlExtender="meeCPF" ControlToValidate="txtCPF" ValidationGroup="vgPF"
            IsValidEmpty="False" SetFocusOnError="True" InvalidValueMessage="Number is invalid"
            runat="server" />

Because it's not a number.  Your mask produces a value like 938.293.290\-32 (I think).  With the multiple "decimal points", it cannot be intrepreted as a number.

Consider setting MaskType="None".  Also, I'm not sure the UserDateFormat is need if it's not a date.

yap, the UserDateFormat i was just testing, forgott to take it off.... but i the \- it's suppost to show ---->>> 938.293.29032 and it actually doesn't do that...

 also this (9{3}\.9{3}\.9{3}\-9{2} ) should work, but it' doesn't... any ideas?

If it's because the MaskType is Number, then it's because a "number" only has one decimal point.  Thus, this format does not confirm to anything numeric, so it should be set to None.