Did you allow remote connections for the second installation in the Surface Area Configuration tool?

>I just Installed SQL Server on 2nd Machine in our LAN. No domain is created, all PCs have same workgroup.
>1st installation of SQL Server is visible on all networked computers, but 2nd Installation on another PC is only visible on local machine, no other networked machines can connect or view this SQL Server.
>Following is services status:-
>

>SQL Server (MSSQLSERVER)                     Started   Automatic
>SQL Server Agent (MSSQLSERVER)                         Manual
>SQL Server Analysis Services (MSSQLSERVER)   Started   Automatic
>SQL Server Browser                           Started   Automatic
>

>Please guide as to what else should be checked.