Hi myla.
First, it isn't a good idea to post email addresses in public forums like these. Spam robots trawl forums for email addresses for spamming. I will ask the Forum Admin to remove both those email addresses.
But I see the problem I think.
You can't change your email address just because you are using different email software. Email addresses are 'assigned' to you by whoever your email provider is. Examples below;
1] My ISP, (Internet Service Provider), is Virgin Media. I have an email account with them, and the name of the account is in the format, myname.xxx@virginmedia.net. I have changed my usual name to 'myname.xxx' because I don't want spammers to get it.
I can use any email software I want, but for each software I must use the same email address, eg myname.xxx@virginmedia.net, that Virgin media gave me, and I must also use the same password that Virgin Media gave me.
2] We can also use web-based email accounts, eg Hotmail, GMail, Yahoo Mail, etc. These are accounts setup over the internet and we access and manage these by using a web browser, not email software. However, some of these web-based email providers also allow us to transfer these accounts to email software, but we must use the same email address and the same password, that we use in the browsers.
3] Some, if not all, ISPs also allow us to access and manage our emails on the web through browsers. In those cases we have to visit the ISP web site, login with the email address and password they gave us, then gain access to our emails.
In your case. I don't recognise Opera.com as an email provider. Have you signed up with Opera for them to be your email provider, or are you still expecting to be able to use the email account you were using with Windows Live Mail?
If you have a 'new' email account with Opera, then they would have given you an email address and a password, and it is those that you must use to setup your email software account.
If you are expecting to continue to use your previous email provider, then you must setup your email software using the 'existing' email address and password.
Here is Opera's tutorial for setting up their email software;
http://www.freeemailtutorials.com/operaM2/setupEmailAccount.cwd
I hope that helps.
Mark