FMP5 & FMP8 Adv, WinXP

I have 3 files that represent a piece of a .fp5 database that I've replicated in another file in FMP8. What I really like about this (.fp5 file) is that, in the .fp5 file, when portal B has info in it and you select another subject from the pull down menu, portal B becomes cleared/blank and waits until you select another topic from portal A. In my FMP8 replication file, portal B retains info even after you select a new subject from the pull down menu and only updates with new info when you select the portal row button in Portal A. In my replication file, I want portal B to clear all its info when a new subject is selected. What makes portal B in this (.fp5) file work so well and clear its info when a new subject is selected? I can’t understand it and I can’t imagine this is due to differences between .fp5 and.fp7 (or is it!?). TIA, lpm

URGENT UPDATE: I was going to attach the 3 .fp5 files ( 37KB, 67KB, and 180KB) to this message for you to look over but I just now found out that the forum only allows me to attach two files and they cannot be filemaker files. What should I do? How can I get the three small .fp5 files out on this forum so people can help me with my problem?

FOLLOWUP: I'm attaching a pdf of the portal screen...hope this helps somewhat. If you know how I can have the portal screen viewed/tried in the three .fp5 files seen, please let me know. lpm

Portal_problem.pdf