configure distribution on a remote sql server

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replication

SQL-Server-2008R2

HI
I have a VPS with public IP '192.xx.xx.xx'. when i installed sql server the sql server default name was the same as my vps let's say it's 'MYVPS'

now when i try to connect to sql server i use the public IP '192.xx.xx.xx' as server name and i had no problem with it.

the problem is when i try to configure a distribution on the sql server i got this message :

" server is unable to connect to server '192.xx.xx.xx'. ........ Specify the actual server name , 'MYVPS'. (Replication Utilities) "

So i tried to change sql server name to be similar to my public ip '192.xx.xx.xx' then i was able to see the configure distribution wizard BUT at the end of the wizard i got the error message :

" SQL SERVER could not configure '192.xx.xx.xx' as a Distributor. ...... Could not connect to server 'MYVPS' because 'distributor_admin' is not defined as a remote login at the server "

on a desperate try i create a new user on my vps computer with the name 'distributor_admin' and a new login with name 'distributor_admin' but nothing changed
Please help