Error while Masthead changes in NWDS7.3

Hi All,

I am trying to modify the Std Masthead of Portal 7.3.

When I imported the WAR file in NWDS I am getting the following errors.

1. componentRequest Cannot be resolved.

    I have already added prtcore.jar, but still getting this error.

2. Constants cannot be resolved.

    com.sap.portal.navigation.afp.collections.Constants cannot be resolved.

    I am not able to find which JAR file is required for this.

Please let me know if any JAR files are needed or any other solution.

Regards,

Sumangala