works on commandline but not in script

[justin case]

hi,

i sucessfully run gnokii under redhat 8.0 so far with a nokia 6210.
strangely the following shell-script refuses to work, but the command itself
works on the commandline:

##########################################################

#!/bin/sh

while true; do

             gnokii --getsms IN SM 1 SM 15 -f /tmp/sms

             sleep 5

            done

##########################################################

i always get the usage-info for gnokii displayed. if i do without SM 15 it
works, but only picks up the first sms.


any ideas would be greatly appreciated.

my regards,
/jc