[XeTeX] Times New Roman otf font Ligatures is not working

[Loganathan, Ganesh (TNQ Software)]

Hi,

Times New ROman otf Ligature is not working. Kindly suggest me to do.

I used

\defaultfontfeatures{Ligatures=TeX}
\setallmainfonts[BoldFont = Times New Roman Bold.otf,
                  ItalicFont = Times New Roman Italic.otf,
                  BoldItalicFont = Times New Roman Bold 
Italic.otf]{Times New Roman.otf}

Every thing is working fine, but Ligature only not working. Such as ff, 
fi fl etc

Regards,
Ganesh