defoma-hints failed

I copy simsun.ttf to /usr/share/fonts/sim/
Then "defoma-hints truetype simsun.ttf > simsun.hints"
But failed,and simsun.hints is like below:
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defoma-hints Can't locate FreeType.pm in @INC (@INC contains: /usr/share/perl5/Debian/DefomaWizard /usr/local/lib/perl/5.6.1 /usr/local/share/perl/5.6.1 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.6.1 /usr/share/perl/5.6.1 /usr/local/lib/site_perl .) at (eval 2) line 2.
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What should I do?
Thanks a lot!
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I follow the tips :
1.LinuxSir - 用defoma管理字体做的debian美化(完美) http://www.linuxsir.com/bbs/showthre...ghlight=defoma
2.LinuxSir - Debian 新手汉化跟我http://www.linuxsir.com/bbs/showthre...threadid=48100
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看看libft-perl有没有装

It can work correctly now.
Thanks a lot.