Android : Resolve this issue as soon as possible

[root@mobilecityguides tools]# ./zipalign -v 4 /root/Desktop/eventseeker.apk /root/Desktop/eventseeker_unaligh.apk Unable to open '/root/Desktop/eventseeker.apk' as zip archive [root@mobilecityguides tools]#

Kindly fix this issue. if run that above command on terminal it is given errore like this.

Unable to open '/root/Desktop/eventseeker.apk' as zip archive