gnormalize - not working

i want to install a gnormalize sound converter, but it wasn't in my repositories, but i found the rpm package on the web, so i used the alien to create a deb file and installed it

but now it is not starting due to this error report:
zbyszek@zbyszek-laptop:~$ gnormalize
Can't locate Gtk2.pm in @INC (@INC contains: /etc/perl /usr/local/lib/perl/5.8.8 /usr/local/share/perl/5.8.8 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.8 /usr/share/perl/5.8 /usr/local/lib/site_perl .) at /usr/bin/gnormalize line 2.
BEGIN failed--compilation aborted at /usr/bin/gnormalize line 2.

what should i do to get it working?