Attempt to change default port

I've successfully installed Xymon 4.3.21, but tried to change it from the
default port of 1984 by changing the XYMONDPORT variable in
xymonserver.cfg.  Unfortunately, this turned the cpu, disk, files, etc. all
purple.  The bbd, conn, http, and xymon status' are all green..  Is there
something else I need to change to be able to run Xymon from another port?

Thanks,

David