[1.58/1.63][BM] Problem with moving host to another computer

I wanted to move a running SE V V1.58 BM 1.11 simultaneous multi-player game to another computer (host).
We are using the european version of SE V with english language.

In the first try I have just copied the files in the folders:
* savegame
* savedempires
* data/settings.txt (we are using a slightly modified: settings.txt)

I used the same CD (and Serial-Key) on the new host, as was used on the old one.
When I started SE V as a player on the new computer and tried loading the game I encountered an error message
"Data files on this computer are not the same as on the host" (or something similar).

When I started SE V as the host and generated a new turn (without player files) the universe was totally scrambled,
there were home systems without any suns, planet types were changed etc.

After reading the change log of V1.63 I decided to update the old host before the move
(at least the fix in the checksum calckulation looked promising).
I updated the old and the new hosts to V1.63 and generated a new *.gam-file on the old host computer,
then I moved again the files to the new host - with the same, unpleasant result.

What is going wrong ?
I would be gratefull for any constructive ideas, suggestions, tips...

Please ignore any spelling or grammatical errors because I am not a native english speaker.