If you're using the freeware version of DX Studio, the following restrictions will apply...
| • | No more than 10 mesh/bitmap definitions per scene, or 10 physics enabled objects. |
| • | Resource export/write to library disabled. |
| • | Network communications are disabled. |
| • | No more than 1000 vertices editable at once in the modeller. |
You can purchase a full edition of DX Studio from the product website at http://www.dxstudio.com/buy.aspx