Help please!

Several times every day Draftsight opens fine, I will work for several minutes, maybe a hour and as I am trying to move or scale something, Draftsight just stops working. The spinning wheel comes up, the screen is gray and the computer tells me that the session is no longer responding. I have this problem everyday and several times a day, which makes my day very long and frustrating.

Can someone please help me?

Thanks,

Christina