Francois -- A "V" shape indicates that the guide camera is not aligned with the mount axes. That's OK unless you are using a rotator. Are you able to guide within MaxIm after calibrating? If not that is the problem you need to solve first before using ACP. Once you have it guiding in MaxIm, pelase first go through the process as described in ACP Help under AutoGuiding Your Mount. It is complex mostly for off-axis rotated guiding which is a complex issue on a German Equatorial mount :-)

I'll try to help but your support and upgrades expired 9 months ago. I assume this is Christian Hennes' system, right?