Installation problem with 1&1

Hello,

Im using 1&1 server for my website. and im not able to setup piwik. I follow the instruction from piwik. I copy piwik with binary mode to the server.
I was stuck on the step where i can not call the path
my-website.de/piwik
piwik.my-website.de

its come with blank page.

what step I did wrong?

Thank you in advance

Best regard