Hi Wynford,
I'm sorry to hear about the trouble you are having. I'm not aware of any technical problems on our side of things that would prevent you from being able to enter the description in your listings so I suspect there must be something on your end of things that is conflicting with the loading of the description editor.
If you are still experiencing this problem, I recommend contacting our customer support team using the form on the following page of our site for assistance:
http://www.auctiva.com/help/requesthelp.aspx#-Mike