mobile

I am using xperia e3 dual (d2212) . I have rooted my phone and then I accidentally uninstall default download manager from like2sd . now I can't update apps from play store and chrome crashing while try save image ( for larger file I use external download manager) . I have tried sony pc companion to repair but I'm not succeeded . I have the download manager apk was made a back up . when try install it's shows " Application not installed " . I try to put back that apk file to /syatem/app and reboot my phone . but not work .. Please help me out..