Calling procedures inside packages in Oracle from Delphi

I have recently started with packages in Personal Oracle7.
I am working with Delphi 2 C/S and cannot figure out how to
call the modules inside the packages.
It seem as if i cannot use the component StoredProcedure directly, as the
database package.function/procedure does not appear in the list.
Am i doing something wrong or is it really necessary to use TQUERY component
to call the modules.
Has anyone out there any experience in this ?