Hi Hamdi kharrat,
Thanks for contacting Syncfusion forums.
We are able to reproduce this issue in v9.3 and we are glad to let
you know that this is internally fixed and available in our latest Essential
Studio release Volume4, 2012. Could you please let us know whether your
interested in upgrade to our latest version? Our latest version is available in
the following link,
http://syncfusion.com/downloads/latest-version
if not,
please create a incident to get the patch for this fix in your specific
version.
Regards,
Varalakshmi