Are any poclbm processes actually running and staying idle or are they simply not starting in the first place?
I must apologize for my lack of Linux skills, I have no idea how to monitor running processes under Linux and therefore no idea how to check if they start at all.
I don't have much experience with Linux either... but if I remember right you can type "top" in to a command prompt and it will show you the top processes. I don't remember the command to show all the processes though.