I'm so sorry, I'm going to rephrase again:
You cannot suppress the 'column grand totals' if the 'Row grand Totals' are also suppressed (or vice-versa) when you're only displaying either the Row or the Column.
If you do, then the Crosstab does not show up.
You can see from Adrian's screenshot that he hasn't included a column in there.
-Abhilash