Ok, basically I'll summarize the meaning of this error. When channel mode +R = Only registered (+r) users may join the channel [o]; is set, you have to have a +r usermode to join. This is mainly used to deter spammers/bots and the likes. Your nickname has to be registered under nickserv and also has to be identified to via the identify command. Look at the information obtained below from NickServ, for full documentation.
-NickServ- Syntax: REGISTER password
-NickServ-
-NickServ- Registers your nickname in the NickServ database. Once
-NickServ- your nick is registered, you can use the SET and ACCESS
-NickServ- commands to configure your nick's settings as you like
-NickServ- them. Make sure you remember the password you use when
-NickServ- registering - you'll need it to make changes to your nick
-NickServ- later. (Note that case matters! ANOPE, Anope, and
-NickServ- anope are all different passwords!)
-NickServ-
-NickServ- Guidelines on choosing passwords:
-NickServ-
-NickServ- Passwords should not be easily guessable. For example,
-NickServ- using your real name as a password is a bad idea. Using
-NickServ- your nickname as a password is a much worse idea ;) and,
-NickServ- in fact, NickServ will not allow it. Also, short
-NickServ- passwords are vulnerable to trial-and-error searches, so
-NickServ- you should choose a password at least 5 characters long.
-NickServ- Finally, the space character cannot be used in passwords.
-NickServ-
-NickServ- The parameter email is optional and will set the email
-NickServ- for your nick immediately. However, it may be required
-NickServ- on certain networks.
-NickServ- Your privacy is respected; this e-mail won't be given to
-NickServ- any third-party person.
-NickServ-
-NickServ- This command also creates a new group for your nickname,
-NickServ- that will allow you to register other nicks later sharing
-NickServ- the same configuration, the same set of memos and the
-NickServ- same channel privileges. For more information on this
-NickServ- feature, type /msg NickServ HELP GROUP.
-NickServ- Syntax: IDENTIFY password
-NickServ-
-NickServ- Tells NickServ that you are really the owner of this
-NickServ- nick. Many commands require you to authenticate yourself
-NickServ- with this command before you use them. The password
-NickServ- should be the same one you sent with the REGISTER
-NickServ- command.
The following commands were used to obtain the above information.
/msg nickserv help register
/msg nickserv help identify
/helpop chmodes
/helpop umodes
R = Only registered (+r) users may join the channel [o] (Channel Mode)
r = Identifies the nick as being Registered (settable by services only) (UserMode)
If your having any other troubles, feel free to ask anything in here or feel free to join the #help channel on the Dejatoons network to talk to expierenced users that can also help you in any future trouble.