Name problem

I'm sorry if this has been asked before, but I'm new to the
list, and
fairly new to Endnote.  Can someone please tell me how you
put an
author's name into Endnote that contains a suffix (such as
Sr. or Jr.)?
If you put the comma after the name, then it references them
with the
suffix as the last name.

Thanks in advance for any help with this as I'm sure it's
something easy
but silly (like many of the oddities in Endnote)

Tom