Can't add pointer domain

I’m trying to add a pointer domain… I’ve been doing quite a bit of juggling here… the domain I want to point to used to be a pointer domain itself… but then I promoted it to its own siteworx account. Now, I’m trying to point domains at the new account… however, when I try to add a new pointer domain I get the error “Invalid IP Address” from the SiteWorx add pointer domain function. Here’s the log from /home/interworx/var/log/iworx.log:

Apr 01 22:45:10 httpd.php [info] script begin
Apr 01 22:45:10 httpd.php [debug] httpd.php --dump-vhosts
Apr 01 22:45:10 httpd.php [info] script end
Apr 01 22:45:10 vpopmail.php [info] script begin
Apr 01 22:45:10 vpopmail.php [debug] vpopmail.php --add-alias-domain --domain=primary.com --alias-domain=secondary.com
Apr 01 22:45:10 vpopmail.php [info] script end
Apr 01 22:45:11 vpopmail.php [info] script begin
Apr 01 22:45:11 vpopmail.php [debug] vpopmail.php --delete-alias-domain --alias-domain=secondary.com
Apr 01 22:45:11 vpopmail.php [info] script end

Any ideas?