Subject Problem occuers while trying to generate trace file

Hi experts

I would like to trace data base activity in fire bird using Audit/Trace Services. I run this command in my command prompt:

C:\Program Files\Firebird\Firebird_2_5\bin>fbtracemgr -se localhost/3050:service_mgr -user SYSDBA -password masterkey -start -name "User Trace 1" -config "fbtrace.conf" > C:\Users\Babak\Desktop\trace.out


This command generates trace.out file, but I get such an error:

error during fopen operation for file ftrace.conf

error while trying to open file

System can not find the file

What should I do to solve these errors?

thank you so much