Custom size drawing reduce size to fit pasted object - don't want

I am using Visio 2003 standard.

I created a custom page which is 4.2135 x 3.3117 inches. When I paste a
Visio object into my page and save it, the custom page resize itself to the
size of the pasted object (which in my case smaller then my original page
size I created).

I would like the size of my custom page fix in size and don't change.

How do do this ???

I did this: 1) Print setup, I just used letter size Page size) I used
custom size and set it to 4.2135 x 3.3117 landscape. The print zoom shows
fix exactly 1 sheet.

I would appreciate any help !!!

If I put a border around the original custom size, the the will not change.

Thank You,

G