Hi and a merry christmas to all,

I'm working through the tie fighter project from this site and have hit a problem.
It's my first attempt at using maya to model.
If you look at the attached pic, i've got to the stage of exturding the rings on the support arm. After selecting the faces and the exturd tool, the faces move out as indiviual arms and not as a complete ring.

As anyone any ideas what setting i've got wrong/

Many thanks.