Hi Mic,
Can you try the following:
Create a script file. Edit the actual command you want to run inside the double quotes
echo "b profile command here" > /root/ramcache.clear.sh
Make the script executable by root
chmod 744 /root/ramcache.clear.sh
Edit root's crontab
crontab -e
Add the following two lines (from: http://www.thegeekstuff.com/2009/06/15-practical-crontab-examples/)
At 9:10 and 11:10, run the ramcache clear script on the active unit
10 9,11 * * * if [ `/bin/ps1` == "Active" ]; then /root/ramcache.clear.sh > /dev/null 2>&1; fi
Aaron