error '800a0411' Name redefined (ASP VBScript)

Hello, I am new in trying to program and I have this problem when I am trying to test my Login page built in Dreamweaver CS4 and my database is in Microsoft Access.

The error message is the following:

Microsoft VBScript compilation error '800a0411'

Name redefined

/Login.asp, line 10

Dim MM_NBconnect1_STRING
----^

I have checked the code view , its not repeated towice , so the problem should be something else.