🚀 go-pugleaf

I have set up five simple form fields (name, business, address, phone number, fax number) on a PDF document using Acrobat 4.0. I used no security settings--there are no restrictions. The file is compatable back to Reader 3.0.   I have had no problem accessing and entering information in the fields, but two other people who have access to the file say that one of the fields is inactive, and that they are not able to select or highlight the field. I Have tried to reproduce their problem by opening the file on several PCs with different operating systems and different versions of Reader, but all of the fields work for me.  Are there any know issues on this topic. My clients want me to recreate all of the documents that include forms, but I dont know what I would do differently. This is a tough troubleshooting situation. I don't want to put a lot of effort into trying to make the file NOT work.  Can anyone help or offer comments?  Thanks, Bruce