HELP With SQL Statement...urgent!

Hi,

I have a table that lists all attempts at logging in to a server.
Columns are:
userid, firstname, lastname, login_date, login_time

If a user attempted to login 5 times, then I want to return the row
(with all columns)......
BUT I only want to return the row with the 5th time attempted.

something like this:
select * from mytable
join
select userid, login_date from mytable
group by userid, login_date having count(*) > 4
BUT, how do I get just the 5th time attempted??

Thanks!
Skiz