I was registed a webhosting with M6.net, But i dont know where is folder to upload index file (index.html)

Anyone help me please,

Thanks for you time

This is a question you should ask M6. Contact their support.

Right, But i think today is weekend because i was send email to them and received a ticket but no answer.
Thanks ASPcode.net

This is just my opinion.

Their web based email front end is constantly down (iMail).
Their technical support is truly horrible.

it would be most likely public_html

or htdocs

or www