sqlserver连接有关问题

sqlserver连接问题
请教:
      用vb.net   连接sqlserver数据库,tcp/ip已启用,本机连接,一切正常   ,如下
        Public   connectionString   As   String   =   "Data   Source=.;Initial   Catalog=flaxdb;Integrated   Security=True "
      但数据源一改成ip,就连接不上,如下
            Public   connectionString   As   String   =   "Data   Source=10.1.0.157:1433;Initial   Catalog=flaxdb;Integrated   Security=True "
      防火墙都已经关闭,1433端口换成其它端口,也不行   .
      不知该如何设置！



[解决办法]
Public connectionString As String = "Server=10.1.0.157; " & "Database=flaxdb;Integrated security=true; "