outlook express

This seems to be a common problem with upgrading to Microsoft Office 2007. Outlook Express 6.0 does not use its own spell check dictionaries but that of Microsoft Office 2007. After upgrading from the old Microsoft Office the languages of English, Spanish, and German are removed and replaced but the new files are incompatible with Outlook Express 6.0. You can check it out on Microsoft's website here.

http://support.microsoft.com/kb/932974

What is crazy is that their solution is to download third party software to do it for you! Here is one that I found highly recommended.

http://www.snapfiles.com/get/spelloe.html

Hope this solves your problem! Let me know if you have further questions.

-Travis