appcfg.cmd java version; 1.7 installed; 1.6 in path; tells me it needs 1.6 ti yokiad

appcfg.cmd java version; 1.7 installed; 1.6 in path; tells me it needs 1.6
ti yokiad

I try to use this command to deploy my application to appspot.google.com:
c:\a\appeng\bin\appcfg.cmd --use_java7 update c:\a\u3e
Generates the error messsage.
C:\a>c:\a\appeng\bin\appcfg.cmd --use_java7 update c:\a\u3e
Registry key 'Software\JavaSoft\Java Runtime Environment\CurrentVersion'
has value '1.7', but '1.6' is required. Error: could not find java.dll
Error: could not find Java SE Runtime Environment.
I tried setting the path to use the Java 1.6 SDK we downloaded but that
did not help or change any thing.

The web resources talk about what version of Java is used by the
application once it appears on Google's servers; I did not see anything
about the Java version for the upload process including
developers.google.com/appengine/docs/java/gettingstarted/uploading and
developers.google.com/appengine/docs/java/tools/uploadinganapp#Command_Line_Arguments
as well as searching this site specifically and checking google.
Can I deploy an application from the computer in my house without
deinstalling the Java 1.7 I use for other purposes?
Dr. Laurence Leff Associate Professor of Computer Science,
Western Illinois University, Macomb IL 61455 on sabbatical