Login redirect

Hi there,

The LOGIN link in my menu looks like this : (*with a redirection)
http://domain.com/wp-login.php?redirect_to=http%3A%2F%2Fdomain.com%2Fregister

I changed it in the menu (*using custom link) and specified it to be :
http://domain.com/wp-login.php
But that redirection variable still come back automatically
... How can I fix this ?

I'm using membership2, and specified an URL in there but the redirection variable takes over

So, how can I get rid of that redirection ?
Thank you