how to use parmetis like gpmetis

Hi

I am using the command line tool gpmetis,
a typical call looks like this:
gpmetis -objtype=vol -minconn my.graph 4

Now I want to do this with parmetis. But parmetis doesn't have all the command line tools of metis, there is only parmetis. So I wonder how the call might look with parmetis, I tried this
mpiexec -np 4 parmetis my.graph 1 4 0 0 0 0

But the partitioning is not as good as with gpmetis.

Thanks for any help!

Magnus