Error loading some perl modules on spamassassin

[Rafael Vallejo]

Hello list.

I have a problem with spamassassin and is that some perl modules I got 
messages like this

[20075] dbg: diag: module not installed: LWP::UserAgent ('require' failed)

UserAgent is a module among others I want to use, I installed by hand 
spamassasin and have no other choice, LWP and all the modules it need is 
there in where it is supposed to be 
/usr/lib/perl5/vendor_perl/5.8.1/LWP, but spamassasin does not locate it 
my guess is that perl or spamassassin does not get the path for LWP for 
some reason.

Is there any file in where Perl and/or spamassasin look to know where 
modules are loaded?

Regards

-- 
Rafael