Still a newb... but i'd thought i'd post a comment.
Completely agree with unSpawn there... gotta say that fixing the underlying problem is where you should be spending your time.
Also, to the OP: My Centos system keeps cron logs in /var/log/
Which is useful for seeing whether it ran a command... although more specifically, it will email root if there are any problems. Checking your emails - try running "mail" - might help you out a little with cron.
Just my 2c.
If im wrong... hopefully the Regs will let me know.