Can't Connect

Need help on connecting to the server. I get a message saying my usernames are invalid. Unable to get a response from the server when I type anything in the server. Each nickserv command I use tells me to register. But when I register using "/nickserv register password email" nothing happens.

m/O=Irchighway/L=World/ST=World/C=World
* * Subject: /CN=irc.irchighway.net/OU=Routing Team/O=Irchighway/L=World/ST=World/C=World
* * Issuer: /CN=irc.irchighway.net/OU=Routing Team/O=Irchighway/L=World/ST=World/C=World
* * Certification info:
* Subject:
* CN=irc.irchighway.net
* OU=Routing Team
* O=Irchighway
* L=World
* ST=World
* C=World
* Issuer:
* CN=irc.irchighway.net
* OU=Routing Team
* O=Irchighway
* L=World
* ST=World
* C=World
* Public key algorithm: rsaEncryption (2048 bits)
* Sign algorithm sha256WithRSAEncryption
* Valid since Apr 10 01:30:48 2016 GM to Apr 10 01:30:48 2019 GM
* * Cipher info:
* Version: TLSv1/SSLv3, cipher ECDHE-RSA-AES256-GCM-SHA384 (256 bits)
* * Verify E: unable to verify the first certificate.? (21) -- Ignored
* Connected. Now logging in.
* *** Looking up your hostname...
* *** Found your hostname (REDACTED) -- cached
* Capabilities supported: away-notify extended-join account-notify multi-prefix sasl tls userhost-in-names
* Capabilities requested: away-notify extended-join account-notify multi-prefix userhost-in-names
* USER :Your username is not valid
* Capabilities acknowledged: away-notify extended-join account-notify multi-prefix userhost-in-names
* Closing link: (REDACTED) [Registration timeout]
* Disconnected (Remote host closed socket)

Open the network list with Ctrl+S or HexChat -> Network List, and change the User Name to a valid one. Generally it must be at most 10 characters long and subject to the same other restrictions as your nickname.