Which version of m2eclipse are you using?
Could you send log file?
It would be good if you could try the latest version of m2eclipse (http://m2eclipse.sonatype.org/update-dev) and JBoss Tools nightly build (http://download.jboss.org/jbosstools/updates/nightly/trunk).
I am already using the m2eclipse from update-dev, eclipse says:
Maven Integration for Eclipse (Required) 0.9.9.200909092308 org.maven.ide.eclipse.feature.feature.group
Before I had used the update archive, now I switched to the URL http://download.jboss.org/jbosstools/updates/nightly/trunk/ and updated, the outcome is the same.
Since this seems not to be a wrong usage, I have created a Jira Issue and will attach the logfile there: https://jira.jboss.org/jira/browse/JBIDE-4972