Oracle Connection String in asp.net c#

Question

Please help.....

 

I'm using c# asp.net and oracle database, And here is my connection string

 

static string strConnection = "Data Source=test;User ID=testing;Password=test123";

public OracleConnection DbConn = new OracleConnection(strConnection);

DbConn.Open();

 

then i got this error: ORA-00018.Maximum number of sessions exceed,

i did anything from own idea but it doesn't work.

 

thank you.