CALS table: how to set number of columns

[Isgrit Bloch <ib@bofinger-translations.de>]

Hi,

I dont know how to create a CALS table with more than two columns.
I use XXE and I inserted an informaltable with a tablegroup, and I gave 
the tablegroup the attribute COLS=5.
However the table has still just 2 columns.
What did I do wrong?

Thanks
Isi