[Pgpool-general] error to createlang ...

[erobles]

Hi! i have an error when i try to  add/create a plpgsql language in 
Postgresql 8.3.1 on SCO Openserver 5.0.7
createlang: langauge installation failed: ERROR could not access file 
"$libdir/plpgsql": No such file or directory.


But,  the file plpgsql.so exists in the directory, please,could you 
suugestion to fix that error???.



by the way this message has been posted to postgres list too.