sqlplus run script in neighbouring directory

Hi,
I need to run one script from another which is in another directory and i can't work it out. Here is how it is: +parent_dir

+child_dir_1

       +script_1.sql
+child_dir_2

       +script_2.sql

I want to run script_2.sql from script_1.sql and expected to use something like following:
@@..\child_dir_2.sq\script_2.sql but it doesn't work and i keep getting SP2-0310: unable to open file error no matter what i try. Any help will be appreciated. Received on Tue Dec 11 2007 - 09:03:21 CST