Remote Validation not Fired for MVC

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C#

MVC4

Dear All,
Currently i am facing a problem related to MVC 4 Remote Validation.

I have 1 models Name UserModel along with remote validation

[DataType(DataType.EmailAddress)]
       [StringLength(50)]
      [Remote("IsNameExists", "User", ErrorMessage = "Login ID/Email Already is in use.")]
       public string UserLogon
       {
           get;
           set;
       }

Now ,above models being used by Multiple view like User & Signup , both views have same model value like
@Html.TextBoxFor(model => model.UserLogon,
new { placeholder = "Enter Email", @class = "inputSPCL", @maxlength = "50" })
@Html.ValidationMessageFor(model => model.UserLogon)

But problem is that, above Remote validation fired for User View but not working
for Signup.

Can any one please help me on this?

Regards