Problem of api with ultimate facebook. api working fine with comment +

Hi,

I have installed the plugins:
1. Comment +
2. Ultimate facebook

I have created a facebook app and have been able to get the comment + working but the ultimate facebook keep displaying

Please, enter correct Facebook API settings

is this because I need to create seperate facebook app for the ultimate facebook plugin or is it due to other technical issues?

look forward to your reply.

Peace
YAss