Unsure what happened.  All was working fine untill I started creating combo-boxes bound to certain elements.  I'm using a translated file and no problem. I created 5 Tabs, with diverse elements on each. Saved my work and could see all records when I press F10 to see the next record and so forth.  To this point all OK. Now what I did was began to create 2 combo-boxes bound to their elements (campus and civil status). I entered the available options for each. Now, I made the campus and civil status invisible and moved them off the tab they where on, saved the work.  All was fine until I moved them back onto the tab.
Why I moved them back on? The devil told me to do it.
Now when I hit the F10 key it closes Sesame. Any ideas as to what I did wrong or should do? I have backups of everything, so I can rework it with no problem.

I have e-mailed the file (DSR and DDT), compressed using XP-Pro.