SQL Developer

Hi all,

Am trying to unlock hr schema so I can practise the Oracle tutorials.
I did manage to unlock it using the sql*plus with the following command

Alter user hr identified by hr account unlock;

And

Grant create session to hr;

But when I try it on SQL developer, it doesn't work.

The " grant statement" worked but when I try to select * from employees it says " the table or view does not exist"
Pls advice