[SOLVED] Reach db in separate php file

[eluser]predat0r[/eluser]
Hi all,

I have a Jquery ajax code that pass datas due POST to a php file. This file would be write the datas in the database. But it gets an error with Active Records "cannot use $this .."
How can I use AR db functions in this file? (Of course with normal php db connet and query code it works).

Thank you