Thanks to Flash Fuck it! I got my traces working in Flash again.
Normally every traced line is written into flashlog.txt file…but actually no flashlog file was being generated! so problem wasn’t on that usefull extension but in flashplayer configuration.
So, here’s the solution i found out:
look for “mm.cfg” file into /Library/Application Support/Macromedia,
then open it with a text editor and write these two lines:
ErrorReportingEnable=1
TraceOutputFileEnable=1