WEB-INF v. required package subdirectory

[RAndy Peter]

I'm using Tomcat 3.2, stand alone.  When I put my servlets under
WEB-INF/classes, everything works fine.  But when I try to place them in the
sub-directory required by a package (for example, WEB-INF/classes/aaa/bbb/),
Tomcat can no longer find them.  I've tried several different placements of
the sub-directory structure, but to no avail.  Anybody care to help me out?