[Xymon] Need help to configure ssh test

Hello,

I hope I am sending this question to the correct list. I've been trying to setup a basic network test (ssh) for a multihomed server in such a way that the connection test goes to IP "A" and the SSH test is performed on IP "B"

This is how my bb-hosts line looks:

1.2.3.4 sever.domain.com # conn=worst,10.20.30.40 ssh:25052 at 10.20.30.40

If I read the MAN page for bb-hosts correctly this should work, but on the xymon logs I see this:

2011-04-06 22:16:56 WARNING: Could not bind to source IP 10.20.30.40 for test (null): Cannot assign requested address.

Can someone kindly explain what I am doing wrong? We are running Xymon 4.2.3

Thanks in advance for your help,

~Alex