add new email account to outlook 2007 issue

I want to set up two email accounts in outlook 2007 in one computer

I already have one email account set up. Now I added new profile and set up the 2nd email id but when I open MS outlook 2007 and select 2nd profile, it was asking for domain name and user id and I put like domainname\my2ndemailuserid and it works. But when I want to open the old one, I have to again type domainname/my1stemailuserid

Is there any way I can use both just selecting domain name and user name instead of typing every time.