Oracle problem please help me...

Question

using Oracle.DataAccess.Client;

string DefCon = "Data Source=serverbem;User ID=mytest;Password=bem;ProviderName=ORACLE";
OracleConnection myCon = new OracleConnection();
myCon.ConnectionString = DefCon;
myCon.Open();  


its so hard to remote connect using oracle. PLEASE HELP ME. i always bump with this error

Server Error in '/PersonQuery' Application.

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'providername' is an invalid connection string attribute.

all i want is to connect remote connect to oracle. i'm using Oracle10g express edition. PLEASE HELP ME WITH MY PROBLEM huhuhu.