OT: printing filepro on SERIAL PORT Linux

[Enrique Arredondo]

I'm need help, I have a filepro system running on Fedora Core 6 and I need
to print a label to a printer that's on port /dev/ttyS0 (com1) but the 
damn thing won't print because cups is reporting this error :

Unable to open serial port device file "/dev/ttyS0": Permission denied

I searched all over the internet and lots of people having the same 
problem but I can't find the solution, Does anybody knows how to fix that 
error ?

[root at atktest dev]# lpstat -t
scheduler is running
no system default destination
device for okidata: 
serial:/dev/ttyS0?baud=9600+bits=8+parity=none+flow=soft
okidata accepting requests since Mon 04 Dec 2006 09:00:35 AM PST
printer okidata is idle.  enabled since Mon 04 Dec 2006 09:00:35 AM PST
         Unable to open serial port device file "/dev/ttyS0": Permission 
denied
okidata-1               root             18432   Mon 04 Dec 2006 09:00:32 
AM PST

Thanks so much.