It looks like XAMPP is starting correctly
A. what happens when you go to http://localhost/xampp
in your browser?
B. 1 -I expect you are trying to access your PHP pages by opening them in a browser?
2. or by 'preview' do you mean using "dreamweaver'?
"if the answer is 2 - it is a Dreamweaver issue"
C. You should use the new XAMPP Control Panel - either use xampp-control-3-beta.exe in the root of \xampp (1.7.7) or DL the latest version by following this Control Panel thread:viewtopic.php?f=16&t=46743
(its also included in the 1.8.0 package as xampp-control.exe)