Table is readonly - how to change?

First: I'm completely new to oracle. I have to create an app using Delphi that connects to an Oracle 8.0.5 server and writes records into a table. To create a testbed I got the 30 day trail version, installed it, started the schema manager, logged in as INTERNAL and created a new table called TEST in schema DEMO.
My app connects fine to oracle and logs in as user DEMO, but cannot insert data into the table.
From within the schema manager I try to add the object privilege for user DEMO to do INSERTs into TEST.
I get
  VAS-04025: INSERT ON DEMO.TEST unsuccessful   QRA-01031: Insuffient privileges

If I try the same from within the security manager I only get   QRA-01031: Insuffient privileges

What do I have to do?

BTW: I'm using the german Oracle 8, so my translations may not reflect the original terms of the english version.

--
Elektronik-Labor Carls
GmbH & Co KG

Stefan Paege

paege_at_el-carls.de, Tel ++49 (5973) 9497-23, Fax -19 Received on Tue Jun 29 1999 - 09:26:16 CDT