transformation dockers no longer work

I have been using coreldraw 12 for some time and all of a sudden the transformation docker,  I usually get it to pop up with the alt F7 shortcut, does not come up.  None of the ones listed under arrange, transformations will work.  Have I accidently turned something off or what.  I have uninstalled and reinstalled and it is the same.  I am running windows 7