title: Can't get application to find android.support.v7, won't find appcompat_v7 project
body: <p>I'm trying to create an Android application in Eclipse (on Windows Vista), and I can't get it to find the <code>android.support.v7</code> library stuff that I need.  I think I'm setting things up correctly, and what I'm doing works on one computer but is not working at all on another, and I need help figuring out where things are going wrong.</p>
  
  <p>In Eclipse, I followed the steps to create a new "Android Application Project", and selected API 11 as the minimum SDK, and went through all the other steps.  (For "Create Project in Workspace", I unchecked it and asked for the files to be created in a location on a network drive, in case that matters.)  This created another project, <code>appcompat_v7</code>, which I understand is how things work now.  I built that project.  But then when I tried to build my application, I couldn't get past <code>The import android.support.v7 could not be resolved</code> errors. </p>
  
  <p>Here's the symptom that concerns me: I right-clicked on the application project and selected Properties -> Android.  The bottom part, "Library", has "C:\users\me\workspace\appcompat_v7" in the left (Reference) column, and a question mark in the right (Project) column.  [This is the workspace directory, not the network-drive directory where I'm keeping the files.]  Also there's a red X next to the pathname.  I tried selecting Add, which brought up a list including the <code>appcompat_v7</code> project that got automatically added.  I selected that, and it got added to the list with a green check mark.  Then I selected the other one and Remove'd it.  Now the list had just one <code>appcompat_v7</code> project, with a green check mark, and the correct name in the right column, so everything looked OK.  I clicked OK (also tried Apply then OK).  But when I went to Properties -> Android again, now the red X was back and the project name was <code>?</code> again.  So it seems that something it was able to find just a few seconds ago could no longer be found (?).  Rerunning Eclipse hasn't helped.  The <code>workspace\appcompat_v7</code> directory and its contents seem to show up normally in a <code>dir</code> command, although if there's something missing I wouldn't know what to look for.</p>
  
  <p>Any suggestions about what to try, or what to check for?</p>
  
  <p><b>EDIT:</b> By experimenting, I've found more information.  Apparently unchecking "Create Project in Workspace", and then selecting a network drive, is what causes the problem.  If I start with a clean workspace, and uncheck "Create Project in Workspace" and select a directory on the C: drive, everything works fine.  If I do the exact same thing but select a directory on a different drive, such as a network drive or USB flash drive, the problems show up. </p>