the first command should be chmod -R 777 /User or whatever the full path to the top directory is. I don't know what the * infront of it is for.
I don't know about mounting novell file systems, so i'll assume you do and the command is correct.
if it's not working, then check what user you're trying to run this cronjob as. Did you crontab -e as a regular user? if so, then you're cronjob is running as a regular user and might not have permissions to run those commands. The first command sounds like it should be run as root. Actually so does the second command if you're talking about mounting. Your cronjob should be running as root.
Anyway, check your mail too as the user who ran the cronjob. Errors in execution get mailed.
edit: also for the second cronjob, if you want every 5 minutes change the first star to */5.