Jassica,
This looks almost identical to your first node. I understand that the help the monks gave you at that time was not what you were looking for. You were concerned with the single quotes and not a different way of doing it. I do however want to point you back to the wisdom of merlyn, which can be found here. It is concerning the precedence of the -o or operator. It is possible this is what you intend to do, or it is possible this is an oversight.

I also see you are new to the monastery - welcome. Thanks for sticking with us. If you get answers to your questions that you are not expecting - do not hesitate to clarify yourself.

Cheers - L~R