Recent times, I saw many discussions on User-Forums about Help not working in Photoshop Elements 9.0 and here is one of the workaround worked for most of them. So I though of keeping it at one place and share with other folks who encounter the same problem in future.
Here are the steps to follow:
a) Browse to “C:\Program Files\Adobe\Adobe Help”
b) Double Click on “Adobe Help.exe” (BLUE ICON with an “I” on it)
c) Go to Edit > Preferences (refer to screenshot)
Here are the steps to follow:
a) Browse to “C:\Program Files\Adobe\Adobe Help”
b) Double Click on “Adobe Help.exe” (BLUE ICON with an “I” on it)
c) Go to Edit > Preferences (refer to screenshot)
d) Select “OPEN COMMUNITY HELP APPLICTION” and click Done.
e) Launch Photoshop Elements Editor and launch Help.
Comment back in case this doesn't work for you. I will try to find out other resolution for your specific problem.