RIA service Client side Validation using Metadata

[Ubuntu]

Dear All,
I have created a project using EF4, RIA Service, few telerik controls.

I define my client-side validation using .shared files and add then using DataAnotation to the metadata class as follows:

public static class CustomDailyValidation
{
    public static ValidationResult ValidateSubsidiary(int id, ValidationContext validationContext)
    {
        if (id <= 0 || id == null)
        {
            return new ValidationResult("ERROR", new[] {validationContext.DisplayName});
        }
        return ValidationResult.Success;
    }
}

MetaData:

[CustomValidation(typeof(CustomDailyValidation), "ValidateSubsidiary")]
public int subsidiary_id { get; set; }

I then populate the subsidary_id with data using QDSCV (no Problem here)

I then add the xaml definition as follows:

<telerik:RadComboBox x:Name="discriptorId" Margin="0,0,0,5" Grid.Row="1" Grid.Column="3" IsEnabled="{Binding IsNew}"
    ItemsSource="{Binding Path=DiscriptorsCollection,Mode=TwoWay}"
    SelectedValue="{Binding Path=CurrentDaily.discriptor, Mode=TwoWay,NotifyOnValidationError=True,ValidatesOnExceptions=True}"
    SelectedValuePath="discriptor_id"
    DisplayMemberPath="discriptor_name_1"/>

The validation works as soon as I open the page, I don't know why, but anyway that is not the problem, the problem is that the subsidary_id combobox is displaying the error but with different message says "Input is not in correct format".

I don't know from where is that comes? how to stop / override?

Note:
I have another RadDatePicker that has different validation method,
when I set a break point in the client-side validation class the validation method for the date field is hit, but not the combo.

Any help !!

[Shenbagaraj]

Im also having the same issue if any one know the answer plz help me ..  

if i remove ValidatesOnExceptions=True then "Input is not in correct format" is not firing and validation is also not working

i have tried ValidatesOnDataErrors=True, ValidatesOnNotifyDataErrors=True, NotifyOnValidationError=True}

when i use silverlight combobox its working fine. but not in radcombobox....

help me ...