Thanks a lot for this nice piece of software you make.
I run Asterisk 1.6.0 on Debian/Squeeze 64 bit and there's no specific tarball for this Debian version. I tried the version for Debian/Lenny with no luck:

gateway:/etc/asterisk# /usr/local/fop2/fop2_server --test
IO object version 1.25 does not match bootstrap parameter 1.23_01 at /usr/lib/perl/5.10/DynaLoader.pm line 219.
Compilation failed in require at /usr/lib/perl/5.10/IO/Handle.pm line 9.
BEGIN failed--compilation aborted at /usr/lib/perl/5.10/IO/Handle.pm line 9.
Compilation failed in require at /usr/lib/perl/5.10/IO/Seekable.pm line 9.
BEGIN failed--compilation aborted at /usr/lib/perl/5.10/IO/Seekable.pm line 9.
Compilation failed in require at /usr/lib/perl/5.10/IO/File.pm line 11.
BEGIN failed--compilation aborted at /usr/lib/perl/5.10/IO/File.pm line 11.
Compilation failed in require at -e line 376.

Are you planning to port FOP2 to Debian/Squeeze 64 bit?

Thanks and good luck!