Digital Workshop

I have just been working on a program, standard stand alone presentation, when it has become impossible to see one particular page. I saved the program, closed it down and reopened it, the page appears, slightly out of position, but as soon as an attempt to move it to centre it, it disappears. I have added another page (as the problem page was the last one) but the same problems still exist. All there is on that page is two text blocks, two sound files and one jpeg image, pretty much the same as the other pages. What I do remember is that when I was trying to add a drawing object the image changed to a check board? Since then I see the page briefly, (one corner of it) then as soon as I try to reposition it, it disappears.
Grateful for any suggestions.
Kind Regards,
Tom

Can you send the publication in to Support? (support @ digitalworkshop.com) It would be easier to see the problem "in the flesh" if possible. Thank you.