Fills and strokes

If I place any shape onto the stage all I see is a green outline with no fill.

E.g.

I place a rectangle onto the stage and use the colour mixer in linear mode, I cannot see the changes I have made. If I run the test movie the rectangle is correct with the linear attributes.

This is the same even if it is just filled with a single colour or I change the stroke. It is fine in preview (test movie) but all I see on the stage is an unfilled rectangle with a green line.

It is driving me nuts and I would be grateful for any help.

Thank you in advance

skjc