You should recieve an email which includes your new account information when you sign up for a new wordpress hosting account.
Copy and Paste the information like this that you recieve from your chosen wordpres hosting provider, into the contact form on the wordpress hosting page. Alternatively, just forward the email to me: brad at wordpresssites.net
This is a sample email for a new domain i purchased recently through netfirms
Thank you for choosing Netfirms!
This email is a very important resource that will help you get started with your new Netfirms account. We recommend saving this email for future reference.
Username: doblog.biz (or do-blog while domain is in registration)
Password: [chosen on signup]
Domain Name: doblog.biz
Home Directory: (Leave blank or /www/doblog.biz while domain is in registration)
Control Panel: https://controlpanel.netfirms.com/
FTP Access (Use Passive Mode): doblog.biz
(or do-blog.netfirms.com while domain is in registration) Home Directory: /www/doblog.biz
(or http://do-blog.netfirms.com while domain is in registration)
Nameservers: ns1.netfirms.com and ns2.netfirms.com