Error Creating GIF image

Hello,

I am getting an error

Error in <TGX11TTF::WriteGIF>: can not create GIF of image containing more than 256 colors

root: ROOT 5.26/00 (tags/v5-26-00_at_31883
Linux 2.6.18-164.2.1.el5PAE #1 SMP Tue Sep 29 19:14:47 EDT 2009 i686 i686 i386 GNU/Linux

I show in root, but couldn't get proper answer http://root.cern.ch/phpBB2/viewtopic.php?p=6633&sid=866b2363f681efd79583a7be9fc51529

Could you please suggest what to do.

Regards,
S

-- 
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Research Student,
High Energy Physics, India.