Formulas lost, OSX.7.5 to iOS.6.1.3

I created a spreadsheet in Numbers ('09, v2.53 build 554) on my desktop that contains a popup and a bunch of formulas and tables. I intended to put it on my iPad for reference "on the go".

Frustratingly, when I copy it to my ipad via iTunes or email all the formulas are lost and all I have is text. If I try to upload it to iCloud I am told that it is an invalid format.

I am open to suggestions as to how to resolve this bugaboo. I was able to create a functional spreadsheet (with formulas and everything) on my ipad and transfer it to my desktop with no issues. What am I doing wrong?

Thanks,

Marty