Issue with email validation

I'm trying to enter an email that ends with @q.com my validator will not allow it. What is wrong with it?
My validation control looks like the following:
<asp:RegularExpressionValidator ID="EmailValidator" runat="server" ControlToValidate="EmailText" ValidationExpression="(\w[-._\w]*\w@\w[-._\w]*\w\.\w{2,3})">*</asp:RegularExpressionValidator>