Skip Forms Authentication to load a page using onClick event

I have a LoginPage.aspx linked to Forms Authentication. For visitors who wish to register to my site, there is a Link Button "Click Here".

On Click Event of this button, I want to load "RegisterMember.aspx" page.

I wish my site to behave like:

Existing Users:

LoginPage.aspx ---> Login--"HomePage"

New Users:

LoginPage.aspx---(Onclick to LinkButton "Click Here")-->RegisterMember.aspx---LoginPage.aspx---(login)-- HomePage.

I have used Response.Redirect("RegisterMember.aspx") in the LinkButton click event, but forms authentication is not allowing to load the new page and loads the same login page.

Seeking input from fellow members. Thanks in advance