Dreamweaver Login problem

Thank you for this sugestion.

My case was a bit different. This problem was related to unproperly alocating the root directory in preferances, it suposed to be c:\xampp, and I used c:\xampp\htdocs

Secondary: I have stoped IIS and Adobe requiers IIS to run along with the other server.

After I fixed this problems every thing vent fine.

Thank you

This is a case of "headers already sent". It's an issue that confuses a lot of beginners, and can sometimes be difficult to resolve.

PHP cannot create a session or use the header() function if there has been any output to the browser before the session is created or the header() function is called. What makes this sometimes difficult to understand is that "output to the browser" includes any whitespace, newline characters, or other control characters.

A common cause of the problem is extra whitespace outside the PHP tags in an include file. The login page includes the page with your MySQL connection, which is stored in the Connections folder. You need to check both the login page and the connection file to make sure there is no whitespace or newline characters outside the opening PHP tag on the login page or outside the opening and closing PHP tags in the connection file. You can tell if there are any newline characters after the closing PHP tag in the connection file if line numbers are turned on in Code view, as shown in the following screenshot:

The other potential cause of this problem is using the Unicode Signature (BOM) in PHP pages. Select Modify > Page Properties, and open the Title/Encoding category in the dialog box that opens. Make sure there is NO check mark in the Include Unicode Signature (BOM) checkbox.