Anyway to redirect Non-Members?

I tried editing the one of the membership string and adding the link to the join.php, but the message comes up for memebrs also who need to upgrade and not join..Is there a way to redirect non-members only to the join.php if they try to access something I haven't given permission to? Thanks

You will have to PM me for help on this one.  I cannot seem to get the code to display correctly using the formatting provided.