'Microsoft.ace.oledb.12.0' not read all the rows from .xlsx file on server (IIS7)

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I know that is this question has dozen of answers and posts, but nothing works for me.

We have my MVC4 application and i deployed it to IIS7 to my server and one more machine where we don't have visual studio installed.

We are doing import/export data from/to excel for doing bulk entry.

we do have data around 20000 in one sheet with .xlsx format of Office 2007(File is save as Excel Work book).

Now when i read data by using following code it just read data around 4000-5000 rows only.

This whole below code working fine in my local machine where i do code and read all 20000 rows data from "Excel 97-2003 Workbook with .xls"
but not working with "Excel Workbook with .xlsx".

private void FillDataSet(HttpPostedFileBase file, DataSet ds)
    {
      using (
        var con =
          new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" File Path";Extended Properties=Excel 12.0"))
      {
          con.Open();
          var dtSchema = con.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
          var strSheetName = "";
          strSheetName = dtSchema.Rows[0]["TABLE_NAME"].ToString();          
          var cmd = new OleDbCommand();
	  var da = new OleDbDataAdapter();
	  cmd.Connection = con;
	  cmd.CommandType = CommandType.Text;
	  cmd.CommandText = "SELECT * FROM [" + strSheetName + "]";
	  da = new OleDbDataAdapter(cmd);
	  da.Fill(ds);        
      }
    }

I have gone through the below steps and solutions but it's not working for me.

-Installing Microsoft Access Database Engine 2010 Redistributable
-Installing 2007 Office System Driver: Data Connectivity Components


we are confuse why it is working on my local machine and not working on server.
Please provide any idea or solution for this issue..

What I have tried:

I've tried this:
-From the solution explorer right-click your project then click Properties
-Click the Build tab
-Change Platform target from: Any CPU to x86 | Any CPU to x64
-Re-build your solution
-Also made changes on IIS in Advance setting with Enable 32-Bit application as True/False.