I want to use Font size, Text color, BGColor... on Mediawiki

Hello

I want to use Font size, Text color, BGColor... on Mediawiki+FCKeditor

so, I have modified fckeditor_config.js like below

FCKConfig.ToolbarSets['Wiki'] = [
....
['FontFormat'],
....

];

->

FCKConfig.ToolbarSets['Wiki'] = [
....

['FontFormat','FontName','FontSize'],
['TextColor','BGColor'],
....

];

It is working well on the Mozila FireFox but not working on the Internet Explorer

Because The Mediawiki FCKeditor replace <span style="color: rgb(255, 153, 0);">Red</span> with <span style="">Red</span> on the Internet Explorer

Please let me know how can i fix this problem.

Thank you

best regards