Need your help, I have a public Facebook app in a site but I manage other identical sites that use the option to logging via Facebook, but it just work with my credentials (app ID, sceret id and the registered url). I saw in a vbulletin forum that they have a similar situation,they use their application with all the users that bought that module and the users just need to create theirs secret id to use the same vbulletin app. I tried to use my app ID and put an other secret ID from other facebook account that I have but I got an error message that says that the app ID does not correspond to that secret ID. Did you have any tutorial, code , where I can combine my Facebook app with other sites ? Thanks!