[Linux-parport] PPCLAIM ?

[Amith]

hi all,
            when i open /dev/parport0 using open() system call, i get a valid file descriptor, but when i try to claim
the port (using PPCLAIM - ioctl(fd, PPCLAIM) )  i get  , "no such deivice or address" - returned by perror .

Any idea's why ?

cheers,
Amith

PS: I was refering to Linux 2.4 Parallel Port sub system - available on the net.