apertura file txt

[techno]

raga mi dite cosa non và in questo script???
Perchè a me sembra tutto apposto, lo sto facendo funzionare in locale.

$leggi=fopen("counter.txt","r+");
chmod("counter.txt",0644);
$visite=fread($leggi,filesize("counter.txt")); 
fclose($leggi); 

mi da questi errori:
Warning: fopen(counter.txt) [function.fopen]: failed to open stream: No such file or directory in C:\Programmi\EasyPHP 2.0b1\www\script\global.php on line 7

Warning: chmod() [function.chmod]: No such file or directory in C:\Programmi\EasyPHP 2.0b1\www\script\global.php on line 8

Warning: filesize() [function.filesize]: stat failed for counter.txt in C:\Programmi\EasyPHP 2.0b1\www\script\global.php on line 9

Warning: fread(): supplied argument is not a valid stream resource in C:\Programmi\EasyPHP 2.0b1\www\script\global.php on line 9

Warning: fclose(): supplied argument is not a valid stream resource in C:\Programmi\EasyPHP 2.0b1\www\script\global.php on line 10

il file txt e la apgina dellos cript se trovano nella stesa cartella.