Not able to configure taglib

I am using myfaces 1.2.5, Tomcat 6.0, eclipse 3.4.1, jdk 1.5 for my project. I have used FACES IDE from Ameterus for development. I am facing two problems :

1) In my JSF enabled JSP pages sometimes compiler accepts JSF tags like <h

utputText> <h:commandButton> but sometimes they are not compiled. The behaviour is random. Also text completion using cntr+space works sometime for these tags while sometime it fails. Although I m using JSP 2.x and servlet 2.5 as per Tomcat 6.x but still I am giving taglib location in my web.xml. I have copied myfaces_core, myfaces_html from lib/META-INF folder to tld folder in WEB-INF.

My sample JSP and Web.xml is as follows:
<%@ page contentType="text/html; charset=Cp1252" %>
<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=Cp1252"/>
<title></title>
</head>
<body>
<f:view>
<h:panelGrid columns="2" border="0" cellspacing="5">

<h

utputText value="File Name:"/>
<h

utputText value="#{myBean.myFile.name}"/>

<h

utputText value="File Size:"/>
<h

utputText value="#{myBean.myFile.size}"/>

<h

utputText value="Param:"/>
<h

utputText value="#{myBean.myParam}"/>

<h

utputText value="Result:"/>
<h

utputText value="#{myBean.myResult}"/>

</h:panelGrid>
</f:view>
</body>
</html>

web.xml

<taglib>
<taglib-uri>http://java.sun.com/jsf/html</taglib-uri>
<taglib-location>/WEB-INF/tld/myfaces_html.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>http://java.sun.com/jsf/core</taglib-uri>
<taglib-location>/WEB-INF/tld/myfaces_core.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>http://myfaces.apache.org/tomahawk</taglib-uri>
<taglib-location>/WEB-INF/tld/tomahawk.tld</taglib-location>
</taglib>

2.) myfaces_core in tld folder is giving following error

cvc-elt.1: Cannot find the declaration of element 'taglib' This error is in <taglib> tag of tld.

The tag is :<taglib xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-jsptaglibrary_2_1.xsd"
version="2.1">

Due to this there are warnings :
schema_reference.4: Failed to read schema document 'http://java.sun.com/xml/ns/javaee/web-jsptaglibrary_2_1.xsd', because 1) could not find the document; 2) the document could not be read; 3) the root element of the document is not <xsd:schema>

Please help in this regard

Here goes my Sample

I have copied myfaces_core, myfaces_html from lib/META-INF folder to tld folder in WEB-INF.

Why ?

Because before that tags were not getting identified in JSP page. So i copied them in WEB-INF/tld and put up an entry in web.xml for taglib location