Problem while loading a file of 6 mb

Hello, I am using PDF Architect 4.0.

Iam trying to edit a file of 6 MB with mostly text and a few images. but it takes hours to load everything. I open it with Acrobat reader and it loads inmediately, but PDF Architect continues to have the red dots turning around on the screen like saying “loading” but it never really load. I am 16 mb of memory SSD disk, so everything is fast enough, but the program does not do it´s job. Can you help?