make cleantext from paste in fckedito with firefox and Iexpl

hello,

i would like delete styles from pastes in my fckeditor.

In firefox it's good but in internet explorer is not working.

the code in my page is:

function FCKeditor_OnComplete( editorInstance )
{
editorInstance.Events.AttachEvent( 'OnPaste', cleanTexto ) ;
}

var counter = 0 ;

function cleanTexto( editorInstance )
{
editorInstance.Commands.GetCommand('PasteText').Execute();
}

In firefox no problem but in IE i think it can not understan this sentence : editorInstance.Commands.GetCommand('PasteText').Execute();

What is the problem in IE? I need help you

thanks for all