engineImportTXD for 2 diff. models, but both same mod

[Bonus]

Hey, I got this problem:

I download the file and load it with engineLoadTXD and engineImportTXD.

Same for DFF.

In that way I try to change 2 models / skins.

But it changes both models with the SAME TXD AND DFF.

Both models get the same mod and I dont know why.

addEventHandler ( "onClientFileDownloadComplete", resourceRoot, function ( fileName, suc ) 
    if suc then 
        outputDebugString ( fileName ) 
        if fileName == pathone..".txd" then 
            outputDebugString ( 1 ) 
            engineImportTXD ( engineLoadTXD ( fileName ), 7 ) 
        elseif fileName == pathtwo..".txd" then 
            outputDebugString ( 2 ) 
            engineImportTXD ( engineLoadTXD ( fileName ), 9 ) 
        elseif fileName == pathone..".dff" then 
            outputDebugString ( 1 ) 
            engineReplaceModel ( engineLoadDFF ( fileName ), 7 ) 
        elseif fileName == pathtwo..".dff" then 
            outputDebugString ( 2 ) 
            engineReplaceModel ( engineLoadDFF ( fileName ), 9 ) 
        end 
    else 
        outputChatBox ( "Skin konnte bei dir nicht runterladen werden!", 200 ) 
    end 
end ) 

Debugscript says:

[2016-02-04 15:18:55] INFO: Skins/Skin1/Skin1.txd 
[2016-02-04 15:18:55] INFO: 1 
[2016-02-04 15:18:55] INFO: Skins/Skin1/Skin1.dff 
[2016-02-04 15:18:55] INFO: 1 
[2016-02-04 15:18:55] INFO: Skins/Skin2/Skin2.txd 
[2016-02-04 15:18:55] INFO: 2 
[2016-02-04 15:18:55] INFO: Skins/Skin2/Skin2.dff 
[2016-02-04 15:18:55] INFO: 2 
[2016-02-04 15:18:55] INFO: Skins/Skin1/Skin1| Skins/Skin2/Skin2   -- thats outputDebugString ( pathone.." | "..pathtwo ) 

Normally it has to use Skin1 and Skin2 (both other skin mods).

But only Skin2 gets used for both models.

Why?

[Bonus]

Solved ...

It was not the code, it was the model-ID

Had to try many combinations, atleast 264 and 258 worked.