codeignitor and firephp: firephp loaded but doesn't log anything.

[eluser]tokanizar[/eluser]
As I said in UPDATE. I used Firefox 5.0 with Firebug 1.8.5b yesterday but FirePHP did work. Today it doesn't work in this configuration anymore. Downgrading Firebug to 1.7.3 solves the problem. Now I am using Firebug 1.7.3 with Firefox 5.0, FirePHP Core 0.3.2 and FirePHP add-on 0.5.0.