Hi,

I have created Facebook as authentication provider and the authentication works and take the user to standard login page.

i would like to take the customer portal to force.com site page.

i am referring this help page to add parameters in the URL but when i did and try to call the SSO URL it give me a error as Bad_id

https://help.salesforce.com/apex/HTViewHelpDoc?id=sso_provider_addl_params_site.htm&language=en_US#sso_provider_addl_params_site.xml

the error message i get is below

https://cs8.salesforce.com/_nc_external/identity/sso/ui/AuthorizationError?ErrorCode=Bad_Id