Also, on first stage, you are opening /cgi-bin/compteleShits (hehe), the correct path of that file would be /home/your_site/cgi-bin/compteleshits
you shoud probably do:

open(hits,"$filename") or print "Can't open $filename";   #"die" could
+ give you an "Internal server error" without any description.
[download]

So you know if the file is opened correctly.