I have downloaded and uploaded, activated successfully the plugin : Sidebar login of wordpress.org, which can be found here : Sidebar login
In the picture description of sidebar login(in the link above), there is register link, so that people can use it to generate a new username via email. However, in my blog, it has only the forget password link :
So, what was the problem ?
I beg your pardon for my question if you feel my question is not appropriate. Please help me. Thanks.