Getting Error when creating a publication in snapshot replication

Getting Error when creating a publication in snapshot replication

i'm gonna create a snapshot replication on sql server 2008 R2 database
instance, but when on Replication Node, on Local publications , i'm using
new publication sub menu, i get this error Message :
New Publication Wizard
SQL Server is unable to connect to server '192.168.1.7'.
For help, click:
http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&ProdVer=10.50.1600.1&EvtSrc=Microsoft.SqlServer.Management.UI.PubWizardErrorSR&EvtID=CantConnect&LinkId=20476



ADDITIONAL INFORMATION:
SQL Server replication requires the actual server name to make a
connection to the server. Connections through a server alias, IP address,
or any other alternate name are not supported. Specify the actual server
name, 'SHAHEDINSTDB02'. (Replication.Utilities)
when i use computer name for connecting to sql server, after connecting, i
get this error message again, could you please he;p me?