Hi, I just installed Maya (8.0) and i seem to be doing something wrong. The left menu bar often stops working. It's the bar with the buttons like 'Move tool', 'Rotate tool' and 'Scale tool'. I select the object i just created, like a sphere, then want to move it around but i can't. Sometimes the buttons do work. I can click what i want but they just don't respond. Another problem i constantly get is that holding the ALT key to move the camera around stops working. Other times it works as expected. What am i doing wrong?