1. Clear you browser cache.
2. Close your browser and restart it.
3. Go to www.ppa.com and login from the home page using your email address and password (not your forum username). Make sure you have the www in the link as it may be related to the cache issue)
4. Then go to www.ppa.com/community/forums/ and try to post.

If it doesn't work, contact customer service center at 800.786.6277 or csc@ppa.com for additional assistance.

Note: Forum login is linked the site login, that is why the forum registration link is disabled.