MyFaces, NB cannot find JSF taglibs

[mutable]

Hello.

I would like to use autocomplete features for JSF tags, however on these taglib declarations:

<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>

NetBeans shows me following error:

"The absolute uri: http://java.sun.com/jsf/html cannot be resolved in either web.xml or the jar files deployed with this application"

I don't know what's wrong. I did a lot of googling but without success. All required libraries are defined in project classpath in project properties.

[mutable]

I'm sorry, it was my fault. I have plain Ant project so when I add library to my lib folder I don't update java source classpath in project properties if I don't need to use new lib in my sources. After updating classpath, everything worked.