SPE for NAS 7.5 - Liveupdate.xml Config

Greetings.

I recently upgraded my SPE from 7.x to 7.5. Unfortunately Liveupdate is falling.

I have checked the log file and the only reference I get for wat could be wrong is:

* Failed to select server

* Failed to connect to server or proxy

When Proxy is specified:

* Proxy authentication failed
 

No matter how I change the liveupdate.xml file parameters, it does not provide a successful update check.

I really hope to get this resolved soon.

Thank you in advance.