Mate, your problem is that you're trying to use
an RPM in Slackware ... slack does have the
RPM executable, but it's not RPM based as
such ... thus you'll NEVER find anything you
want because it won't be in the RPM database.
Try
rpm -qa
It should come back empty.
So, if you NEED to use an RPM, try a
rpm -i --nodeps
to ignore dependency errors.
The cleaner solution would be to grab a source
tarball and install it specifically for your system, using
./configure
make
checkinstall
Cheers,
Tink