title: Installing .apk
body: <p>I generated an apk file for Android version 2.2 with Eclipse => "export", then I dropped it in my Galaxy ACE GT-S5830M (Android 2.3.6) and tried to install, but I got this message: "The application you are installing will replace another application." But I was installing this app for the first time. When I clicked OK, the installation started but stopped in two seconds and I got this error: "Application not installed".
  I tried several times. I also tried on my friend's smartphone, he has a Google Nexus and it installed successfully. Also I checked "Allow installation of non-Market applications" but it didn't help.</p>
  
  <p>Does anyone have any ideas what can I do ?</p>