Ubuntu 12.10 403 Forbidden error

[eluser]jairoh_[/eluser]

Code:

Forbidden

You don't have permission to access /ci/ on this server.
Apache/2.2.22 (Ubuntu) Server at 127.0.0.1 Port 80

why if i use use CI project on my ubuntu and put it on my xampp /www folder it displays that error if i open
127.0.0.1/ci_project
but if i use only an html file like 127.0.0.1/jairoh.html it will work. does anyone knows how to fix this? tnx