Forms Authentication problem with labels

Hi
I have found this little script, and its work i only have some problems.
If typing the wrong info it fires a lberror.text, but if then tying the right info its still show the fired lberror Label and the 2 login labels
lbUser.text and lbSf.text. why and how do i fix it.
So if the user is typing wrong info first time then it fires the lberror and if then after that he/she type the right info then it dont show the lberror but only the
lbUser.text and lbSf.text.

And how do i add this so it works only on the folder /editsite/ so all pages outside that folder is not under this role in web.config and all pages inside that folder are under the role from web.config.
and after login with the right info, how do i then show the lbUser.text and lbSf.text as now for 10 sec. and then be redirect to default.aspx inside /editsite/ folder.

LoginVerifyVB.aspx.vb
Public Class LoginVerifyVB Inherits Syst ...