Save MXD containing Group Layers.

Dear,

I have been working on a map document (MXD)
My layers are classified by Group Layers - Sub-Group Layers - Layers.
After setting the map document properties to Store relative paths and finalizing the MXD document, I transfered my MXD with the related Geodatabase to my pen drive (USB).
Now, after opening it in another laptop, I couldn't find the grouping layers classification ?
Is it normal or do I still need to work out my map document configuration ?


ArcGIS Desktop 10.1.


Please help !