I'm using the fisubice theme I copied the folders in the include directory of the distribution to the include directory of my site. I copied and replaced the code in the mainfile.php and config.php as stated in the in the install documentation. I didn't change any text area pages yet.

When I call up the site with the changes made above. I get the header area only and nothing else shows up on the page.

Can some one help me please

Sounds like there is a problem with the changes to the mainfile.php or config.php. If you made a backup of these files, replace them, then change one at a time (starting with config.php) to see which file causes the problem.
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I went back to the original and it worked. I did the changes to config.php and it looked like everything was still functioning. Made the changes to mainfile.php and it nolonger works.

Ken

For reference by others, the NP mainfile.php did not include part of the patch that defines the INCLUDE_PATH, which is used by the WYSIWYG functions to include the kses filter class. This caused a hard error, which stopped the index page from displaying anything past the header.

We simply added the multi-level if statement to the mainfile that defines the INCLUDE_PATH and all was well.