The spell checker extesnion was discontinued over three years ago, we offer support for discontinued products for 1 year after we discontinue them.
here are a few things to check though:
The Error "The Following Translators where not loaded due to errors" means that you configuration folder has become corrupted. Follow step 2 on the following page:
Before reinstalling your extensions:
Are you using version 8.0.2 of Dreamweaver 8? This is a free update available from Adobe.com