title: m2eclipse says "Missing artifact" but I can build from cmdline!
body: <p>I'm trying to use this Sonatype Eclipse plugin for the first time to handle an existing (huge) software that I can build with maven form the command line.</p>
  
  <p>I have configured the plugin to use my maven 2.2.1 installation instead of the built-in Maven 3.</p>
  
  <p>In Eclipse I have 25 projects (loaded through the root pom.xml) and 4 of them have compilation errors; the maven console contains a lot of lines like this one:</p>
  
  <p>Missing artifact commons-logging:commons-logging:jar:1.0.4:compile</p>
  
  <p>I have all the jars in my repository and the M2_REPO classpath variable correctly defined.  Why the plugin doesn't see all the jars?</p>
  
  <p>The .classpath file of those projects simply references "MAVEN2_CLASSPATH_CONTAINER", there isn't a list of the jars.
  The pom.xml in Eclipse shows an error on the first line for the missing jars but I can build from the command line!</p>
  
  <p>Any idea?  I need help!  I will try to move to NetBeans if I don't solve this problem.</p>
  
  <p>Thank you.</p>