quiver3 arrowhead keeps disappearing

Whenever I use quiver3 and get some data, I want to see a real time plot of my data as it records and also want to watch the vector transform, hence, I want to see which direction it is pointing at all times. For some reason, the arrowhead keeps disappearing each time I rerun my program. I can manually go into the properties of the graph and change it AFTER Im done taking data, but I cant do it while its running, so this is a problem. Here is my code

    figure(1)
    quiver3(data.Tx,data.Ty,data.Tz,35*data.EndoOrient(1),35*data.EndoOrient   (2),35*data.EndoOrient(3),'r*');
    hold on
    plot3(data.Tx2,data.Ty2,data.Tz2,'b*');
    xlim([-250 250]);
    ylim([-200 200]);
    zlim([-1000 -500]);
    drawnow
    hold off

the values are just obtained from the data Im collecting from some equipment I hooked up. Let me know how to get that damn arrow in there! Thanks