Hi Ray,
Thanks! Yes, I did that, and I also tried to look into some of the dyndns script (I am not at home now, and I don't remember which ones from the top of my head...getting old

)
I am not sure into which /var/log/ I should look into to see if there is anything strange there.
I doubt it, but can it have something to do with the fact the I want it to update my own domain zerouno.info instead that the usual mydomain.dyndns.com? The primary domain of the server is zerouno.info correctly, so it should update that anyway. And I did pay the money to dyndns.com to use my own domain, so that setup should be correct too. I also looked at the sourceforge.net forum about the original script just in case I could find some tips there, but I realized that the script in SME Server is customized, therefore hard to get help from there.
I believe the error is in the script that SME is using, but at the same time many others use it with no problem whatsoever. I am lost!
Any other ideas?