Same problem was happening with me. In my case it was showing
Could not install from package "C:\Data\test.sis" on device: General OS-related Error
i manually transferred the file to the device and it shows the update error. so first i uninstalled the application (test) and then tried and it was working then.

may be its the same problem with you
so try to find an application with name new (as in your case it is trying to install 'new.sis') and uninstall it first.