Net beans Build Failed When 

" Deployment error: Access to Tomcat server has not been authorized. Set the correct username and password with the "manager-script" role in the Tomcat customizer in the Server Manager. See the server log for details. "

This happens when you change your username and password in your netbeans, as your netbeans tomcat will have tomcat-user.xml which have default value, either change that or else maintain that record..

to check and rectify mistake go to:

C:\Documents and Settings\{User}\.netbeans\7.1\apache-tomcat-7.0.22.0_base\conf

you can find tomcat-user.xml

open that with notepad and see the last line

it must be

<user username="ide" password="Agt7ViLa" roles="manager-script,admin"/></tomcat-users>

again go back to netbeans

• click on tools
• select servers.
• set Username: "ide" & password: "Agt7ViLa".

or else change it. but you have to edit the file as well as in netbeans.

then go to netbeans and run the project.

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