Hi i am looking for some help, i have been using the pmdg 737 for a while and all was okay until recently my aircraft wont fly correctly and when i climb out of a airport and engage Lnav, Vnav the plane just randomly nose dives or banks left/ right, this is way out of my control because i do not know when this incident will occur. also when this malfunction happens i get a CWS yellow message on the PFD and the Lnav disengages, this is a very frustrating thing to deal with as i fly for many virtual airlines. i have looked for a few solutions even uninstalling the pmdg 737 its self. at first i thought it was my yoke but i also tried to debunk this by flying with the mouse yoke and guess what? same thing happend. uncontrollable nose dive/ bank angle... i am beyond frustrated with this, could anyone give me a idea. thank you