I am receiving this error message when running the code below

'The transaction associated with the current connection has completed but has not been disposed. The transaction must be disposed before the connection can be used to execute SQL statements.' occurred when attempting to 'Execute query'


Code:
#region Export_Admissions

	[Promote(PromotionTargets.All)]
    [Category("Export")]
    public static void Export_TONAdmissions(EXPORT_TON_Admissions1 myData,TON_Export_Import.Declarations.TON_Export_ImportData LocalData)
    {
	try{
		
		
		object missing = System.Reflection.Missing.Value;
        object Visible=true;
        object start1 = 0;
        object end1 = 0;
		
		
		string template = @"C:\BPMv9 MailMerge Templates\TON Main Export Template.xlsx";
     	Application Excel = new ApplicationClass();
		Workbook wb = Excel.Workbooks.Open(template,missing,missing,missing,missing,missing,missing,missing,missing,missing,missing,missing,missing,missing,missing);
		Microsoft.Office.Interop.Excel.Worksheet mySheet = (Microsoft.Office.Interop.Excel.Worksheet)wb.Sheets["TON_Admissions"];
					
		int row;
		int col;
		row = 7;
		col = 1;
		
		myData.Dispose();
		DataSet ds = myData.Read();
		
		
		foreach (DataRow theRow in ds.Tables[0].Rows)
		{
							
			mySheet.Cells[row,1] = theRow["ID"];
			mySheet.Cells[row,2] = theRow["CourseDataID"];
			mySheet.Cells[row,3] = theRow["CourseID"];
			mySheet.Cells[row,4] = theRow["Code"];
			/*mySheet.Cells[row,5] = theRow["Title"];
			mySheet.Cells[row,6] = theRow["Year"];
			mySheet.Cells[row,7] = theRow["StTypeID"];
			mySheet.Cells[row,8] = theRow["StType"];
			mySheet.Cells[row,9] = theRow["ProposedTarget1"];
			mySheet.Cells[row,10] = theRow["ProposedTarget2"];
			mySheet.Cells[row,11] = theRow["ProposedTarget3"];
			mySheet.Cells[row,12] = theRow["ActualIntake1"];
			mySheet.Cells[row,13] = theRow["ActualIntake2"]; 
			mySheet.Cells[row,14] = theRow["ActualIntake3"];
			mySheet.Cells[row,15] = theRow["PreviousTarget1"];
			mySheet.Cells[row,16] = theRow["PreviousTarget2"];
			mySheet.Cells[row,17] = theRow["PreviousTarget3"];
			mySheet.Cells[row,18] = theRow["In_Year_Offers"];
			mySheet.Cells[row,19] = theRow["Intake_Total"];
			mySheet.Cells[row,20] = theRow["Intake_Clearing"];
			mySheet.Cells[row,21] = theRow["Intake_Deffered"];
			mySheet.Cells[row,22] = theRow["Intake_DefferedExpected"];*/		
					
			row++;
		}
		
	
		
		row = row + 2;
		//mySheet._Protect("ask4report",missing,missing,missing,missing);
		Excel.Visible = false;
		
		string SaveDir;
		SaveDir = LocalData.txtFolderName; 
				
		wb.SaveCopyAs(@"C:\BPMv9 MailMerge Documents\TON\Main Export\" + SaveDir + "_Export.xlsx");
		
		
		
		System.Threading.Thread.Sleep(30000);
		myData.Dispose();
		Excel.Quit();
		System.GC.Collect();
		
				foreach (Process process in Process.GetProcessesByName("Excel"))

           {

               process.Kill();

           }
	}
	catch {
		//System.Threading.Thread.Sleep(3000);
		foreach (Process process in Process.GetProcessesByName("Excel"))

           {

               process.Kill();

           }}

		
    }
   
	
	#endregion Export_Admissions