Need to authenticate twice when logged off facebook

Hi !
I have just updated my plugin to version 1.4.43 and this doesn’t seem to solve the issue I’m facing.
I have setted a link such as in the advance use sample, but when I’m logged off from my FB account, I get the site redirected to FB login (OK), authenticate (OK) and then get back to my site (OK), although no authentication has been done. Refreshing the site doesn’t either show me as connected, so no real authentication has been done.
I need to click on my FB login button again to be effectively authenticated.

If I am already logged in FB, then this issue is not present.

So, when I click on my FB login in my site, if I have not been previously logged into FB, all I get is a redirection to FB site, but authentication doesn’t seem to be effectively linked.

Any ideas? Thank you

http://wordpress.org/extend/plugins/nextend-facebook-connect/