I am sorry but your only e-mail was received on Sep. 15th and replied the same day. We do not have a customer support number .. What we do have is an "emergency" support number reserved for cases where something might suddenly stop working for you.
Anyway, you need to have your 2CO details in E-junkie seller admin > Profile (I see that you don't have your 2CO secret word in there) and then you also need to have 2CO item number in your product details for 2CO option to work. The complete details are provided at
http://www.e-junkie.com/ej/selling-with-2checkout.htm