It does update the endpoint but it has then:
<br />
<b>Fatal error</b>: Call to undefined function processDdnsUpdate() in <b>/home/tb/public_html/ipv4_end.php</b> on line <b>91</b><br />
just wanted HE to know about it and didn't find a better place to post
Not seeing that error at this time. Looks like you may have caught it mid-update.