[NTG-context] issue with columns

Hi there, I'm experiencing a weird result when typesetting columns: \starttext The first line not using columns. \startcolumns[n=2] \input knuth \column \input tufte \stopcolumns The second line not using columns. \startcolumns \input linden \column \input ward \stopcolumns \stoptext I don't know why ward isn't typeset on the first page? What am I doing wrong here? Thanks for your help, Pablo -- http://www.ousia.tk