Unable to see changes to PCB in real time

Hi all,

I am having quite a puzzling bevahoir withmy 16.3 Allegro PCB editor. Whenever I open my board file and I try to do any changes to it, i.e. move a component or route a net, I do no see the changes happen in real time.

Normally, when I was working with a PCB, I could select parts and move them about dynamically, i.e. I’d click on a part, then the part attaches itself to the cursor until I click again where I want the part placed. I can see the part move wherever I move the cursor which of course makes placing it an easy task. This time around, I cannot do that! I can click Move, then select the part, but the part itself does not attach to the cursor however the command is effective (as I can read in the command editor window that the part X was selected). The part remains in its current location. Then if I click in the target destination, the part will be moved but I have to press F5 to see the part effectively change placement to this new location.

Same thing happens when I try to route any single net.

I am running SPB 16.3 on Win 7 64bit Enterpris.