[eluser]Daniel Moore[/eluser]
If jessicademattos.com is in a subdirectory of your codeignitor site, then yes, you have a problem.
What you need to do is set up an .htaccess file as follows to place in the jessicademattos.com folder:
An Apache server will keep rules for all parent folders from .htaccess, therefore, you need to turn that rewrite engine off again if you reach a folder you don't want it to affect.