MICROSTATION-TRIM MULTIPLE

Hello,

I am using Microstation V8i SS2.

I am trying to use the trim multiple button and when I am prompted to select cutting edges after selecting the button, I am not allowed to select more than one line as a cutting edge.  I looked at the trim multiple dialog but it does not have any options that would affect multiple cutting edges, only trim, extend or trim and extend options; mine is set to trim.  I have tried pressing the control key to select multiple cutting edges but does not work.  The best work around is to use the break element by point button which is a little inefficient.  How do I select multiple cutting edges to use the trim multiple command?