\input problem

[Erling D. Andersen]

Hi,

I just installed the newest fptex version.

However when I run latex on a file, then latex cannot find files
in

\input{addtex.def}

which is in another directory than the tex file. However, after modifying
the 

TEXINPUTS

variables in texmf.cnf file, then 

kpsewhich

can find the file. I.e. kpsewhich  provides the right path to addtex.def.
What is wrong?

Thanks and regards, Erling

PS. At least to me the manual is not very clear about how to modify
variables such
that latex (and bibtex) can find bib files, input files etc. when they are
not stored
in the current directory.