Radio button not being displayed

Im having the following code, however, I can see that the radio button isnt being diplayed. Only the开发者_StackOverflow社区 label is being displayed. what is wrong with the code?

 <%Html.RadioButton("Role", Role.User, true);%><%=Role.User%>

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Try

<%=Html.RadioButton("Role", Role.User, true);%><%=Role.User%>