[ns] NAM don't update the mobile node movement's starting position

[Syed Md. Ashraful Karim]

Hi
I am using NAM to show the mobile node movement in ns2.33.
NAM is showing the moving nodes, but another initial image of the node
is also kept in the screen. can anybody tell me why? and some of the
nodes are sometimes shown in ash color, not in the default color
black.
If you know why and how can I solve it, please let me
know. attached is a snapshot of nam.
link - http://folk.ntnu.no/ashraful/file/ns/nam-screen.jpg <br>many many thanks in advance.

- Ashraf