Select Contact Field by Cursor Click

[johntap]

I have created a custom field name "Dup Date" and moved some fields around in the Contact layout screen.  I can move from field to field by Tab or Enter or by left clicking with the mouse, except for two fields - the "Dup Date" field and the ZIP field which I have not changed  Why can I not select these 2 field by a mouse click like the other 10+ fields? The ZIP field used to work correctly. 

[GLComputing]

You can't select them with mouse or tab?

Which version of ACT! (full build from help | about)?

What operating system?

[johntap]

I am using Windows XP and ACT 6 Builed # 6.0.3.979  I could previously select the Zip Code field by tab, ENTER, or mouse click prior to revising the Contacts layout screen. When I revised the Contacts layout screen I added the new "Dup Date" field. Since that revision I have been unable to mouse click into either field in the Contacts window. I can click into either field in the Contact Listing window and edit either of them as I please. All other fields respond normally with Tab, ENTER, and mouse click. I have  removed Tab and Enter stops for these 2 fields and then reactivated them with no success to my problem.