[ns] compiling ns-2 problem

[Dalia El3wely]

after making changes in ns2 c++ files , i tried to rebuild ns2 by using " make" 
command, i didn't get any errors, but when i tried to simulate a simple 
scenario i found that my changes have not been applied   !!I'm using ns-2.35 
under cygwin + windows 7..even when i tried to print a simple line on my trace 
file so i've altered cmu-trace.cc file .. changes have not been applied too!! , 
i don't know if i have to change any files else befor compiling ns2, or what..?
Regards,
Dalia Elewely.