Livecycle 8 issue with Acrobat Reader 7.

I have this form, produced in LiveCycle 8. It is a fillable form where users can save the data entered from form so they can modify the contents later on. To make the story short, I have enabled all the rights to the form.

The form itself is dynamic, saved for Reader 7.

Now, the problem I'm having is when the users use Reader 7 to open up the form, they can fill out everything but when they save the form, only certain areas are being saved. WHY?

This only happens with Reader 7 not with 8. I know you are going to say, "WHY DON'T YOU UPGRADE TO READER 8 SINCE IT IS FREE FOR DOWNLOAD?" Great question but with Reader 8, I can't FREE TEXT search the form. I can, however, FREE TEXT search on Reader 7.

Any suggestions why I can't save the data entered on Reader 7?

Thanks.