osgi - Apache Sling: unresolved package after Installing SlingShot sample bundle -

i unable run slingshot sample , apache sling have followed these steps click here! package got installed didn't activated. detail collapsed view of bundle shows

org.apache.sling.api.resource,version=[2.2,2) -- cannot resolved

your bundle import org.apache.sling.api.resource,version=[2.2,2) not resolved. assuming sling installation running, should verify if package org.apache.sling.api.resource either not exported or exported in wrong version. if package present adapt import.