Mod_sms trouble

I use ejabberd-1.1.3 + mod_sms with site http://www.dp.uz.gov.ua/o.palij/mod_sms/

I have mistake:
[18:14:42] <38066431250@sms.jabber.my.domain> error: Failed to determine
domain suffix
Following operators are supported (your number must start with one of this!):

host sms.jabber.my.domain in DNS resolv
my configuration ejabberd.cfg
 {mod_sms, [{from_override, "sms@my.domain"}, {smtp_server,
"mail.my.domain"}, {transliteration, bgn_pcgn_koi8}]},
  {operators, [{"38066", "umc.com.ua"}]}
 ]}.