Hi Athar,
Certenly it is not a bug. Really i made a mistake by myself uploading the wrong version due to not delete del old downloaded version.
Let's me to explain about this :
I am putting me up to date with imscp, that normally it is mantained in our server by a friend and contributor of i-mscp who was who downloaded the plugin from his account but i want also to begin adquiring knowledge on this.
Sorry for the inconvenience.