Problem: RadFormDecorator is working in some controls and not working in some controls.
Solution: This is because of css. If you have applied inline css to any control it over-writes the css of RadFormDecorator ,so it appears that it is not working. Remove the CssClass property in your control and then it will work.
For Example:
<telerik:RadTextBox ID="txt" runat="server" Width="270px" CssClass="bold">
</telerik:RadTextBox>
Solution: This is because of css. If you have applied inline css to any control it over-writes the css of RadFormDecorator ,so it appears that it is not working. Remove the CssClass property in your control and then it will work.
For Example:
<telerik:RadTextBox ID="txt" runat="server" Width="270px" CssClass="bold">
</telerik:RadTextBox>