FREE TEXTBOX NOT RENDERING PROPERLY on WITHOUT COMPATIBLE MODE

Hi,I am using ASP.NET APPLICATION,I am using there FreeTextBox,Basically i have added one dll for that like \Bin\FreeTextBox.dll and I am accessing freetextbox in page like below:
  <FTB:FreeTextBox id="txtDetail" ToolbarLayout="paragraphmenu,
                             bulletedlist,numberedlist, ParagraphMenu, FontFacesMenu, FontSizesMenu, FontForeColorsMenu|;
                             FontForeColorPicker, FontBackColorsMenu; FontBackColorPicker, Bold, Italic, Underline;|
                             Strikethrough, Superscript, Subscript, InsertImageFromGallery, RemoveFormat, JustifyLeft, JustifyRight, JustifyCenter, JustifyFull, BulletedList,
                             NumberedList, Indent, Outdent, Cut, Copy;| Paste, Delete, Undo, Redo, Print,
                             ieSpellCheck, StyleMenu, SymbolsMenu, InsertHtmlMenu, InsertRule, InsertDate,
                             InsertTime, WordClean, InsertTable, EditTable, InsertTableRowBefore,
                             InsertTableRowAfter, DeleteTableRow, InsertTableColumnBefore, InsertTableColumnAfter,
                             DeleteTableColumn, InsertForm, InsertForm;| InsertTextBox, InsertTextArea,
                             InsertRadioButton, InsertCheckBox, InsertDropDownList, InsertButton, InsertDiv,
                             Preview, SelectAll, EditStyle"
                             runat="Server" Width="580px" Height="200px"
                            > 
                    </FTB:FreeTextBox>

  Its working if run IE11 in Compatible mode But When I run without compatible mode then it stopped showing formatting options,so i can't format any data.Please help me how I can fix that so it works fine in both mode.

Regards,
Sudhanshu
SudhanshumAsked:
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Éric MoreauSenior .Net ConsultantCommented:
I found this elsewhere:

FTB is not longer under development and the removal of the MSIE token from IE 11's user agent broke FTB's functionality. Since FTB is reading the user agent directly this occurs even on servers patched with the IE 11 .Net fix or .Net 4.5.

To resolve this situation until we can find a viable alternative for the FTB control I created a rewrite rule to detect IE 11 and rewrite the user agent. Don't forget to add the server variable "HTTP_USER_AGENT".
<rewrite>
<rules>
<rule name="Change IE 11 User Agent to IE 10" enabled="true">
  <match url="(.*)" />
  <action type="None" />
  <conditions>
    <add input="{HTTP_USER_AGENT}" pattern=".trident\/[789]" />
  </conditions>
  <serverVariables>
    <set name="HTTP_USER_AGENT" value="Mozilla/5.0 (compatible; MSIE 11.0; Windows NT 6.2; Trident/7.0)" />
  </serverVariables>
 </rule>
 </rules>
</rewrite>

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