Raster not showing when opened on another computer

The operation was done trough (see below)

Using Navigator select series 6 v8i and Descartes installed. What I do in Navigator I can also see in microstation V8i

1.Attaching a jp2 image in raster manager

2. Using scalable terrain model (that is accesed by Descartes i think) to attach an .stm-file.  "set draping". its done by pushing the button and copy or move the image (jp2-file) and accepting to drape then its done and draped. 

All files are stored in Project Wise.

When this is done I can close the file and open it again and see it on my computer. 

Now the problem is that when this file is opened on another computer the jp2 in raster draping (picture nr 3) has disappeared from the (Right) side under the .stm file, thus leading to that the other computer has to drape it again. The other computers also has descartes so I dont understand why it would not understand to always keep it draped? 

Also, why cant a computer that doesnt have descartes not see the raster draping? why is descartes so neccessary to have on all computers that wants to see the draping?

Raster manager

Scalable terrain model

Raster draping (Set raster button)

I hope this is understandable, if not please write and Ill explain further.

Thanks in advance!