Yes, I have all these things.. And I realized that it works*, but only on windows (on the client side). And since I'm watching the headers with firebug net, I'm unable to see them so I decided that they are not there.. the headers just don't appear. Finally I decided to try with windows, and for my surprise the header appered and it was working..
So, the problem may be this ->
http://groups.google.com/group/firebug/browse_thread/thread/7c1a9c0886d98070/6791b68e3a829ceb. But anyway, firebug is working, while the firephp is not..
I read the FAQ, but this kind of problem is not mentioned.
FirePHP seems to be very usefum tool, and I'll be very glad if I can use it in my linux workstation.
..and yes, thank you :>