GRANT EXECUTE doesn't work?!

Hi everybody!

First of all sorry for my english.
I have a function, and I'd like to give the right to execute it to a
group, so I ran

#GRANT EXECUTE ON function_name_here TO group_name_here;

and also tried

#GRANT EXECUTE ON function_name_here(parametertype, e.g char(10)) TO
group_name_here;

No one works for me.

I ran postgresql 7.3.2 on Mandrake-Linux default build and install, RPMS:

postgresql-test-7.3.2-5mdk
postgresql-server-7.3.2-5mdk
postgresql-pl-7.3.2-5mdk
postgresql-docs-7.3.2-5mdk
postgresql-python-7.3.2-5mdk
postgresql-jdbc-7.3.2-5mdk
postgresql-contrib-7.3.2-5mdk
postgresql-tcl-7.3.2-5mdk
postgresql-7.3.2-5mdk
postgresql-devel-7.3.2-5mdk

I would be gracefull for any answer.

Geza Gemes
an unhappy admin