Ckeditor external fonts problem

HI comp615,
To add fonts i have used the code below

CKEDITOR.config.font_names ="Aachen Bold/Aachen W01 Bold;" + CKEDITOR.config.font_names;

CKEDITOR.on( 'instanceCreated', function( e ){
 e.editor.addCss("@font-face{font-family:'Aachen W01 Bold'; src:url('http://fast.fonts.com/d/b2389136-99bf-4399-a37e-6fed79d5f961.eot?d44f19a684109620e4841471a790e81836d2d8012f816aa8619c04e4569bd48106e364198b3ec04195267f4c9ff386a7a7c3168310944e247e916dfa9192d5ed04f10b49a580e17304fb8db9860f1408&projectId=54ffd173-a2ec-47f3-a89c-4aa4cfffb109');"  );
   });

CKEDITOR.replace( 'txtEdit',
     {
        toolbar :
        [
            
         ['Source','Styles','Format','Font','FontSize'],
            ['Bold', 'Italic', '-', 'NumberedList', 'BulletedList', '-', 'Link', '-', 'About']
        ]
    });

The above code works perfectly as i want in FF and IE7 but the problem is in IE 8., I have also use meta tags to emulate IE7 but was unsuccessfull.

About the font with numbers, since ckeditor puts the font family without quote as shown below so if there is font with spaces and numbers in between it causes error.

 <span style="font-family: aachen 1 bold;">Aachen Bold</span>

I hope the above details helps you to understand my problem. Please help me with this.

I have added a testing url of my code for IE. This changes cannot be seen in firefox becuase i have used eot and not ttf for fonts. You can check this in IE7 where it is working perfectly fine but not in IE8. I hope this will help you to understand the problem more deeper. You can view the source of what i have done. Please reply me asap because i am really stuck with this and need a effective solutions for this.

Here is the url:
http://thewebfonts.com/cksource/demoEnglishIE.html

I did all the setting as you told me but the problem still persists . I removed the instanceReady and instancecreated script of ckeditor and added the fonts like this

var test = CKEDITOR.config.font_names;
CKEDITOR.replace( 'txtEdit',
     {
        toolbar :
        [
            
         ['Source','Styles','Format','Font','FontSize'],
            ['Bold', 'Italic', '-', 'NumberedList', 'BulletedList', '-', 'Link', '-', 'About']
        ],
      contentsCss : 'font1.css',
      font_names : 'Aachen Bold/Aachen W01 Bold;' + test
    });

I have uploaded the latest changes. Please have a look at it.
http://thewebfonts.com/cksource/demoEnglishIE.html

I found an solutions for this. The link you send me was a good help. Actually found out that whenever iframe are used with the font face then on the iframe opening or closing the effect of this font face is removed. In the ckeditor when we open the font list iframe and select a font then on closing the font listing iframe it removes the effect of font face. The solution i found was to reload the css files that i have included in iframe. So on each iframe event i reloaded the css files. The problem here is whenever i reload the stylesheet it downloads the external fonts. This won't cause a problem if there are few fonts but if there are lot of fonts then it will freezer the IE browser. I have uploaded the latest changes in the link below
http://thewebfonts.com/cksource/demoEnglishIE.html

Please have a look at my latest solutions and let me know if there is better solution than this.