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