Eeeeek! I'm new, what magic do you use to get Webmail to work please.

[#1]

Sorry folks if this question has been asked a million times before but have just moved from Madasafish to Plusnet today, got my broadband connected to Plusnet , easy peasy, yippee!
BUT I can't seem to access Webmail  
The email address listed in my Plusnet account details is for madasafish and as far as I can remember I don't think I asked Plusnet about a Plusnet email address but I thought they created a default  one something along the lines of "yourname@username.plus.com" , when I try and access Webmail with my userneme it comes up with ERROR
Unknown user or password incorrect. ?
Sorry for being dumb and the answer may be staring me in the face but could some kind soul give me a shove in the right direction please.
Update:
Okay, I've had a mess around and created a new mailbox and then sent an  external email to it but it just bounces back also external email sent to "my first name@username.plus.com bounces back.

Tried logging into Webmail again using my user name and now it says ERROR: Connection dropped by IMAP server.
I think I will go and have a lie down in a darkened room just now and try again tommorow.

[#2]

Hi 
Welcome to the forum, go to:
1) https://webmail.plus.net
2) Enter in to the box Name: this is your PlusNet Username: for the portal
3) Enter in to the box Password: this is your PlusNet Password: for the portal
4) Make sure you have in the box "Log in to:"  PlusNet  selected
Hope this helps.

[#3]

Hi Midnight Caller
Thanks for the welcome 
Followed your instructions to the letter but I'm still getting ERROR: Connection dropped by IMAP server. 
Maybe Webmail is out at the moment or just not answering the door or maybe there's a wild party happening at Plusnets HQ and carn't hear me knocking 
I'll have a bash again in the morning.
Cheers.

[#4]

Try sending yourself an email - sometimes the mailboxes aren't created until an email is received.
B.

[#5]

Thanks B
Got it sussed, it seems my email address is "username@username.plus.com" instead of  what I thought would be "myfirstname@username.plus.com" also it may have needed a few hours for Webmail to set me up, thats why I was getting bounced emails when I created a new mailbox.
Seems Webmail is a bit more complicated here than MAAFs but I aint complaining as I am saving money with Plusnet and seem to be getting slightly better speeds, hurray 

[#6]

Hi
I just joined Plusnet today so don't know the rules of the site, eg whether to search for a similar topic or start a new one.
I am also finding it impossible to log into Webmail.  My Broadband username is username@plusdsl.net  I have entered this with the password I set when I registered with Plusnet, but keep getting the message, "Unknown user or password incorrect".
I have tried logging in with just my username, but get the same message.
Can anyone help?

[#7]

Note for anyone thinking of replying.
The originator of the previous post has duplicated it in another thread - and probably solved his problem himself from reading the content of that thread.