Trying to Edit text of PDF file

When I place Text Edit Tool in word I want to change (correct spelling), I get message: There is no editable text on this page. I am using Infix Pro 5.28 Win (but for only the first time).
Thanks for any and all help.

It is likely that the PDF does not contain any “real” editable text and contains just images of the pages. It has probably been produced by a scanner. Please refer to:

Infix version 6 which is currently in Beta contains an OCR engine which will allow the text image to be converted to editable PDF text. The beta can be downloaded from