Thanks Mark,
That helped a lot and i am now able to extract the data to the screen.
There is only one problem and that is the size of the file, my script is crashing because it is telling me there is a 'memory leakage'. For this problem i have used the[Chunk] method and the [Data only] method, but this isn't enough. Now i have converted the whole thing to CSV and now it is working fine,..
Problem is that the server can't convert the file from xlsx to csv, i have to do it myself,...
But thanks for everything :)