I found this in the link you mentioned:
images (chmod 755)
uploads (chmod 777)
help (chmod 755)
data (chmod 777)
1 (chmod 777 - including subdirectories)
2 (chmod 777 - including subdirectories)
500 (chmod 777 - including subdirectories)
languages (chmod 755) (a
stylesheets (chmod 777)
templates (chmod 777)
forums (chmod 755)
They were all at 755 and I changed the ones that needed to be at 777. But I'm still getting the same error message when posting. What am I doing wrong? Do you think you can take a look for me? When I purchased the program, I had paid extra for installation, so I'm not too familiar with all the files/directories. I'm pretty sure I changed the ones that needed to be changed to 777 but it's still not working.
Any help for me would be greatly appreciated.