[Fetch error?] Dynamic IP with DtDNS

RouterOS Scripting
1

I modified the script from dydns’s dynamic ip change, from the log, I see that it tries to run fetch command but after that I will not see “log info (“1”)” being executed, all I need to do is to send this command to dtdns.com:

http://www.dtdns.com/api/autodns.cfm?id=mysite.com&pw=mypass&ip=1.2.3.4

Can someone help to find out what error I hit with fetch command?

:global ddnsuser "username"
:global ddnspass "password"
:global theinterface "unifi"
:global ddnshost "mysite.com"
:global ipddns [:resolve $ddnshost];
:global ipfresh [ /ip address get [/ip address find interface=$theinterface ] address ]
:if ([ :typeof $ipfresh ] = nil ) do={
   :log info ("DtDNS: No ip address on $theinterface .")
} else={
   :for i from=( [:len $ipfresh] - 1) to=0 do={ 
      :if ( [:pick $ipfresh $i] = "/") do={ 
    :set ipfresh [:pick $ipfresh 0 $i];
      } 
}
 
:if ($ipddns != $ipfresh) do={
    :log info ("DtDNS: IP-DtDNS = $ipddns")
    :log info ("DtDNS: IP-Fresh = $ipfresh")
   :log info "DDNS: Update IP needed, Sending UPDATE...!"
   :global url "www.dtdns.com/api/autodns.cfm?id=$ddnshost&pw=$ddnspass&ip=$ipfresh"
   :log info ("0")
   /tool fetch url=$url  mode=http
   :log info ("1")
    :delay 1
   :log info ("2")
    :global str [/file find name="DtDNS.$ddnshost"];
   :log info ("3")
    /file remove $str
   :log info ("4")
    :global ipddns $ipfresh
  :log info "DtDNS: IP updated to $ipfresh!"
    } else={
     :log info "DtDNS: dont need changes";
    }
}