such a simple code:

#!/usr/bin/perl
open (COUNTING, "< D:\StronyKlientow\cematsil.bptnet.pl\main\Alicja\pe
+rl\counter.txt")||die"can not open";
$count = <COUNTING>;
close (COUNTING);
[download]

Always returns:
CGI Error The specified CGI application misbehaved by not returning a complete set of HTTP headers. The headers it did return are: can not open at D:\StronyKlientow\cematsil.bptnet.pl\main\Alicja\perl\counter.pl line 6.

Doesn't matter what directory path I write. Is the code wrong? Or server (Apache) is not configured properly? Perl scripts works properly if I do not require any file operations.
I suppose that it is something wrong with the server. Could you help?

Thank you in advance,
Regards,
sOKOle