cursor doesn't move properly within the drafting area

Hi, I'm running Draftsight V1R3.2 on a lapot equipped with intel core i3 CPU U330 @ 1,20Ghz, W7-64 Home premiun SP1, 4GB RAM , external monitor 22" 1920x1050 60Hz, graphic card Intel HD Graphic. If I run Drafsight with the resolution settings as1920x1050 the cursor moves like jumping in a grid. Cannot work. If I change the resolution into 1366x768 than the cursor moves slowly but do not jump. The cursor moves regularly outside the drafting area. This graphic card has not "Advanced Options" to check or un-check "Accelaration Mode".

Any suggestion ?

It is very tiring to work like this but I can manage it for simple drawings and short sessions. Should I work all day long like this I would give up.

thank you  / silvio