I have solved this Issue by using a javscript function that calls the FckEditors updatelinkfield before I make a callback this updates TextEditors.text value with the current Fckeditors Value then it works. Here is the javascript code if anyone needs it. This needs to be added to the page or included in a .js file so it is available.

// Some Class
function WTD_MyClass()
{
        this.UpdateEditorFormValue = function()
        {
                for ( i = 0; i < parent.frames.length; ++i )
                        if ( parent.frames[i].FCK )
                                parent.frames[i].FCK.UpdateLinkedField();
        }
}

function WTD_GetFck()
{
    
    var MyObject = new WTD_MyClass()
    MyObject.UpdateEditorFormValue()
}

So on my submit control I add the onclick("WTD_GetFck()") this does a quick update to the TxtEditor and then I can do whatever I need to in the codebehind for my control.