Hi Martin,
thanks for your comments. I was beginning to suspect that most or all of the conversion software needs some work to obtain unbroken geometries. the method I have used to date is to trace manually and then stick the tracing paper on the screen and follow the lines, clicking about every 2-3mm. I then use splines to smooth out the trace. I realize that this is time consuming, but still much better than anything I have done with the auto trace in serif. The logos i use are not other peoples logos, are drawn specifically for a friend, obviously not in a vector format. copyright does not come into it, but thanks for the warning.