connecting win2000 prof with nt server 4

when i try to connect to Windows nt server 4
(pdc),via a windows 2000 proff machine ,i cANNOT connect to the pdc,and get a error as
pl ender the user name and password.

i have created a user account in pdc.

I think i need to implement to trust relation ships.How do i create a trust relationship in win2000.

kindly help