Building Designer Connect Edition not snapping correctly

Hi, I have been using ABD for a number of years now and have recently upgraded to the connect edition. I now seem to be having problems with snapping where it is not picking up the endpoint or midpoint of an object correctly. I have done some tests just using 2D linework using accudraw and  keypoint snaps. If I offset a line a known distance sometime it will measure correctly and sometimes it wont, also if I draw a line from the end of another line when you zoom in it is off. When I am snapping I am getting the yellow cross but it seems to randomly not work. It seems to be affected by how long you hover over the keypoint snap and also wether you are zoomed in or not, it is as though there is a very small snap window around the keypoint. Is there a new setting I am missing or something?.