Unity and Oracle DllNotFoundException: oci

Hello All,

So basically I was trying to access an Oracle database within unity and mono-develop. I copied the needed DLLs System.Data and System.Data.OracleClient from under: C:\Program Files (x86)\Unity\Editor\Data\Mono\lib\mono\2.0 to the Project's Assets folder,

Here's my C# code:

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3. using System.Collections.Generic;
4. using System.Data;
5. using System.Data.OracleClient;
6.  
7.  
8. public class OracleConn : MonoBehaviour
9. {
10.  
11.     public string connectStr = "SomeConnectionString";
12.     string TBName = "CZRK";
13.     List<string> listOfID = new List<string>();                       //ID
14.     List<string> listOfName = new List<string>();                     //NAME
15.  
16.     private string content;
17.  
18.  
19.     void Start()
20.     {
21.         OracleConnection conn = new OracleConnection(connectStr);
22.  
23.         conn.Open(); //the line that causes error
24.  
25.     }
26.  
27. }

then the error DllNotFoundException: oci pops out when executing conn.Open()
the full error log in Oracle:

Code (CSharp):

1. DllNotFoundException: oci
2. System.Data.OracleClient.Oci.OciCalls.OCIEnvCreate (System.IntPtr& envhpp, OciEnvironmentMode mode, IntPtr ctxp, IntPtr malocfp, IntPtr ralocfp, IntPtr mfreep, Int32 xtramem_sz, IntPtr usrmempp)
3. System.Data.OracleClient.Oci.OciEnvironmentHandle..ctor (OciEnvironmentMode mode)
4. System.Data.OracleClient.Oci.OciGlue.CreateConnection (OracleConnectionInfo conInfo)
5. System.Data.OracleClient.OracleConnectionPoolManager.CreateConnection (OracleConnectionInfo info)
6. System.Data.OracleClient.OracleConnectionPool.CreateConnection ()
7. System.Data.OracleClient.OracleConnectionPool.GetConnection ()
8. System.Data.OracleClient.OracleConnection.Open ()
9. (wrapper remoting-invoke-with-check) System.Data.OracleClient.OracleConnection:Open ()
10. OracleConn.Start () (at Assets/OracleConn.cs:25)

Besides, I also tried copy the DLL file oci.dll from oracleDB_11g into the assets folder, but problem remains, any ideas??

Thanks in Advance!