[Plugin Sharepress] Setup can't connect to facebook

Hi,

I just installed Sharepress on my blog, and I’m stuck on Step 2, the connecting “wheel” is spinning ever and ever.

I know that it usually happens when the domain used to access WordPress installation does not match the one in my Facebook application, but I have configured my face book application using the values given on Step 1, so I guess they are correct :
“Your Site URL is https://www.mydomain.com/wordpress, and your domain is https://www.mydomain.com.”

My blog is installed in https://www.mydomain.com/wordpress, but I am accessing it directly with https://www.mydomain.com, could it be the problem ?