After I install Nuxeo platform 7.2 on Windows, I import its root path(C:\Nuxeo) into Eclipse Kelper EE in order to build the nuxeo project with the aim of redevelop nuxeo. Am I right? During the procure I encounter a error results in the failure of build which says that

Project build error: Non-resolvable parent POM: Failure to find org.nuxeo.ecm.distribution:nuxeo-distribution:pom:7.2 in http://repo.maven.apache.org/maven2 was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced and 'parent.relativePath' points at wrong local POM

How should I solve the problem. And am I doing correctly in order to use Nuxeo to develop a content management software??