You're using tls => 1, which suggests to me that Net::XMPP::Client might try to load an SSL libary. Is the appropriate SSL library installed? I couldn't make out in the source which one the module will (try to) use.

Other than that, I can imagine different line endings as the culprit. I guess you will have to take a look at the difference between the two systems with Wireshark or another network sniffer.

In reply to Re: Net::XMPP in Win32 gets not-authorized, same code works 100% in Linux by Corion
in thread [fixed] Net::XMPP in Win32 gets not-authorized, same code works 100% in Linux by wilsond

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