Connection String on IP

Connection String on IP

i have a problem with my connection string... i want to connect to
172.16.0.253,8887 but i cannot access it in ASP.NET but I can access it in
SQL SERVER... what seems to be the problem with my script
code:
<connectionStrings>
<add name="DBCS"
connectionString="Data Source=172.16.0.253,8887; database = webloan;
User ID=sa; Password=12345; integrated security = SSPI"
providerName="System.Data.SqlClient" />
</connectionStrings>