hi every one...i have a cgi script to send sms as follow...

use CGI;
use Device::Gsm;
my $qu = new CGI;
my @num = $qu->param("num");
my @msg = $qu->param("message");
print "Content-type:text/html\n\n";
my $gsm = new Device::Gsm( port => '/dev/ttyACM0', pin => '0000' , log
+ => 'file,network.log', loglevel => 'debug');
if( $gsm->connect() ) {     #line no.14
print "connected!\n";
} else {
print "sorry, no connection with gsm phone on serial port!\n";
}
$gsm->register();
$gsm->send_sms(
recipient => "$num[0]",
content => "$msg[0]",
class => 'normal');
[download]

im using frdora 12 ....when i run the script as root(su -l root -c "/usr/bin/perl /path/to/script/script.cgi") then script giving the output as "connected" in command line.. but as user(su -l user -c "/usr/bin/perl /path/to/script/script.cgi") its giving error as "Not connected at /path/to/script/script.cgi line 14" ...

the file is under 755 permission. i tried 'su -l user -c "strace -f /usr/bin/perl /path/to/script/script.cgi"'...it's giving 'open("/dev/ttyACM0", O_RDWR|O_NOCTTY|O_NONBLOCK|O_LARGEFILE) = -1 EACCES (Permission denied)....how to fix this problem...i mean how to make the script to work under user...please give me some suggestion to fix this..

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Update

hey...thanks a lot...the problem solved...i gave 777 permission to /dev/ttyacm0......then its working fine...