Default button behavior

[Len Morgan]

In my little authorization stack, I've to two fields and two buttons. 
(Username, password, Login and Cancel).  The Login button has the 
default property set to true.  The problem is when I tab out of the 
password field, it skips over the Login button and makes the Cancel 
button the default (indicated by the ring around the button text).  I'd 
like the user to be able to enter a username, press Tab, enter a 
password, press Tab, then hit Return to log in.  What's happening now is 
the program closes after the second Tab and Return because Cancel 
becomes the default.  What am I doing wrong?

len