problem using ssconvert in shell script

[Raja Iskandar Shah <rajaiskandars gmail com>]

i have created a shell script for ssconvert to convert xls files to csv files

when i execute this shell script as root, it works

but when i set it for cron to execute the shell script it does not work

when the ssconvert is in the cron, it works

the problem is only when the cron to execute the shell script containing the ssconvert command

appreciate any help