vst edit window snap problem, mouse seems out of sink with edit tools Options

[sunkenheadno1]

You lot helped out with my instalation problem so maybe you can help with this slightly simpler one.
When testing out my new cubase 4.1 I thought that I try out the audio editing window. I opened up a vst audio block so that I was viewing the wave form in the Audio Editor window and tryed to move the song position (play bar or whatever you like to call it). When I clicked on the ruler at the top of the window, insted of the song position snaping to where I had clicked I decided to appear about a bar away. I continued to click along the ruler and the song position did the same thing every time, it was inpossible to get it were I wanted. The same sort of thing was happening to the cut tool. If I tried to cut the wave in half say at point 60. the cut would be made at 68 or 51 and so on. Also if selected undo and then cut the wave in the same point I would be cut elce were. I decide that if I could not cut were I wanted then I could just put in a cut anywere and drag the start/end of the audio segment to the required length. NO SUCH LUCK. Even that was going all over the place and parts of the wave kept dissapearing (they would still play but with no vissual wave), fiddling around with the window would bring them back.
I pressumed that it would be a snap problem so I experimented with all the snap settings including off, all to no avail.
I am starting to loose faith in this new (improved?) version of cubase. At least my old copy WORKED!!!!!!!!!!!
Anyone got any good ideas.........