The way that you configure LispWorks for the location of the MySQL library on Microsoft Windows has been changed to make it more flexible when 32-bit and 64-bit programs co-exist on a machine. See the new variable
sql:*mysql-library-sub-directories*
and note the changed initial value of
sql:*mysql-library-directories*
.
LispWorks Release Notes and Installation Guide - 23 Dec 2011