jriver - libboost_regex.so.1.54.0 not found

[dacid]

I am installing the linux version of jriver media player on my system and am struggling with one shared library:

ldd /usr/local/bin/mediacenter19
libboost_regex.so.1.54.0 => not found

But I've emerged libboost 1.54.0-r1 and the file is present:

ls -alt /usr/lib/libboost_regex.so.1.54.0
-rwxr-xr-x 1 root root 935296 Apr 22 20:14 /usr/lib/libboost_regex.so.1.54.0

I must be missing something here!

Dave