Can't locate object method "export_to_level" via package "IO::Tty::Constant"



I am using Red Hat 9.0, it seems to have perl 5.8.0 installed, I am trying
to get a perl package call difwrap running and keep getting the error below.
I have been to CPAN and installed IO-Tty-1.02. Any one any ideas how to fix
it up and get it running ?

Can't locate object method "export_to_level" via package "IO::Tty::Constant"
at /usr/lib/perl5/5.8.0/IO/Tty.pm line 37.

BEGIN failed--compilation aborted at /usr/lib/perl5/5.8.0/IO/Pty.pm line 7.

Compilation failed in require at /usr/lib/perl5/5.8.0/Expect.pm line 22.

BEGIN failed--compilation aborted at /usr/lib/perl5/5.8.0/Expect.pm line 22.

Compilation failed in require at difwrap.pl line 5.

BEGIN failed--compilation aborted at difwrap.pl line 5.


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