Specfic Question Regarding CI Caching

[eluser]taviroquai[/eluser]
Hi! I'm not sure if I'm posting in the right topic but the behavior of my problem seems related to uri and cache...

Recently, i've checkout my project (based on CI of course) into my new ubuntu and there is one URI that no matter i change the name of the function, CI returns a 500 page error...

I'm using folder/controller/function and all of them are ok, except this one:

The html

Code:

<a href="ajaxCall('countries/cmycountry/leaderrules', null, 'all_content')">Leader Rules</a>

From firebug:
http://localhost/~mafonso/dw002/trunk/co...eaderrules
500 Internal Server Error

The result CI html:

An Error Was Encountered

Unable to load the requested file: play/countries/leader_rules.php


Is this a cache problem? How can i clean it?
There are any special permittions that i need to set on some specific folder?

System:
Linux 2.6.32-22-generic
PHP 5.3.2
CI 1.7.2