problem with Automatic solve

I am trying to copy & paste an existing sketch fromautocad to sw2008. When I paste it into an active sketch and thentry to fix points or add relations Solid Works gives me a messagethat automatic solve has been turned off. When I go to sketchsettings to turn it back on it is checked as if it is on but thecommand is greyed out and it will not allow me to turn it back on.Has anyone else run into this problem. Nothing I have tried hadworked and it would take me way to much time to draw this sketchfrom scratch.
Thanks!SolidworksSketching