Running MobileWebApp from GWT_2.7.0/samples

I tried running in SuperDevMode a MobileWebApp placed in Samples folder of GWT 2.7.0 package. I import it via Eclipse Maven plug-in, POM file is executed properly. Then I set Annotation Processing to Enable... and Automaticly. Finally, according to README-MAVEn.txt i execute Maven > Update project in project Properties. 
According to Readme file,at this point I should see a Run in Development mode option, but the thing is,i don't. So in project properties i enable use WebTollkit,GAE and set WAR directory to src/main/webapp.

This gives me Eclipse error:
Description Resource Path Location Type

The App Engine SDK '/home/user/.m2/repository/com/google/appengine/appengine-api-1.0-sdk/1.7.1/appengine-api-1.0-sdk-1.7.1.jar' on the project's build path is not valid (SDK location '/home/user/.m2/repository/com/google/appengine/appengine-api-1.0-sdk/1.7.1/appengine-api-1.0-sdk-1.7.1.jar' is not a directory) MobileWebApp Unknown Google App Engine Problem

Changing AppEngine to default doesn't fix it. 
Is there any way to run this app in SuperDevMode within Eclipse? 

--
You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group.
To unsubscribe from this group and stop receiving emails from it, send an email to google-web-toolkit+unsubscribe@googlegroups.com.
To post to this group, send email to google-web-toolkit@googlegroups.com.
Visit this group at http://groups.google.com/group/google-web-toolkit.
For more options, visit https://groups.google.com/d/optout.