I am use the ubb 6.02 board and i can let send my board mails to new members when the regged the board ....

what can i do about it.

Also when i go to the control off members and use the link send members password an username then also i not get a mail..

That's because Netfirms doesn't have SMTP (outgoing mail)...all free hosts don't have SMTP (I believe)

ok and why i can send from one account on netfirm and not from the second on netfirm ??

http://www.netfirms.com/supportSearch?BROWSE=email

Read question 2:
Do you provide POP e-mail accounts?
No

If they don't provide POP e-mail, then it most likely don't have SMTP either...