How to display Model internal validation messages in asp.net mvc 2?

I have developed the application in asp.net mvc 2 with c# language. I have deployed it successfully on IIS 5.1 ,开发者_Python百科 working perfect. but one of form only displaying the red shade box after execution. It seems like this :

May be this is issue of date format but tough I give it as dd/MM/yyyy it shows same. Also While I have debug the application it is showing the Model.IsValid = false. I just wnt to know what should be the issue there ? Why it is not showing any message on the page ?