I had some problems installing version 9,0,28,0 of the flash debug player…never updates the flashlog.txt (internet explorer or firefox)… I had to get back to 9,0,15,0 version.. ( in firefox… Internet explorer never works…)
These are some related links that can help you (but none works for my flashlog.txt problem 😦 ):
Finally (after some other tests…)
– Debugging with flex builder was possible using Internet Explorer and player 9,0,28,0 (forget firefox debugging…)… including debugging of Modules
– External flashlog.txt isn’t generated with debug player 9,0,28,0 in my development enviroment (IE or Firefox).