TotA

I usually get about 2 hrs into a game and it freezes up. I got it to unfreeze tonight and continue. I had taken out a lease had it paid off. I was showiing a weekly income of 1498 per turn. My econony sliders were all 33% and no money was going to producing anything. No matter what I did with the sliders. My cost research wasnt present on my economy screen.  I have had the game lock up like this everytime I have played. This is the first night I got past it. Is this normal for the sliders?  On the leases and maintennce side. The lease side was empty and the mant. was showing per ship.  Any suggestions!?