INserting images in postgres

Hi,
I made a table test in postgresql as follows
CREATE TABLE test (
number INT;
image OID
);

but the moment i try to insert an image as a normal user it say it
cant do so as a normaal user only superuser (/postgres) can do it.
the command for insert is as follows
INSERT INTO test VALUES ( 1,lo_import('/path/to/file'));
If I want to implement the changes whereby my normal user should
be able to insert into the dbase how do i do it ?
Do i have to edit any file.I saw pg_hba.conf and other file but
found no attributes near it and so also the SET and SHOW declaretions
Can anyone point out the error

Thanks
Sharmad