One half of model cannot display

Hi!

I use Aris Express 2.4 first time. I have a document with EPC model in *. VSD (MS Visio 2007) and  Aris can import *.VDX format. I have done steps:

1. In Visio I converted my document to VDX format.
2. Import to Aris was successful (without error and warning).
3. Document in Aris was load a long time (5 minutes)
4. I founded in Menu VIEW amd choose option MODEL OVERVIEW
5. In this preview I saw whole my project
6. I used that blue rectangle for moving
7. From the center to left side I see my model
8. From the center to right side (in this preview) I see nothing
9. On the main workspace is situation same

I don’t understand, why one half of model can view and second half is non active.

Pls, help.

Thanks a lot.