Really need help!
Delete the preferences file and then restart After Effects.
The preferences directory for After Effects CS4 is here on Windows:
Also, bumping a thread after only half an hour on a Sunday is showing unrealistic impatience. You can't expect people to help immediately, especially on a Sunday.
Check your permissions on your user folder.
What if I'm on 10.9.2 (Maverick) and there is no library folder in the user folder?