Could not find installable ISAM when Filling Adapter

[Mcamp]

I am trying to get excel sheet data imported to a gridview. I am getting the error "Could not find installable ISAM" when the debugger reaches the ".Fill(dsSurvey);" portion of the code. I am using Windows XP, Office 2007, and the excel file is generated as a .xls file which is Excel 8.0. I have searched the web and installed drivers to try to fix this as microsoft advised but that does not fix it. I have been playing around with the connection string but I am not sure that is where the problem is since it occurs directly at the Fill. To test I tried commenting out the last two lines of the code and rerunning but I get no error so I assume the issue has something to do with the .Fill() line alone and nothing else but I cannot be sure. My code is below:

public void ImportExcelSh()
        {
            GrdVwSurvey.Visible = true;

            OleDbConnection conn = new OleDbConnection();
            conn.ConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;" + "Data Source=" + flePath + SLASH + fleName + ";" + "Extended Properties=Excel 8.0;HDR=Yes;IMEX=1;ImportMixedTypes=Text;TypeGuessRows=0;";

            OleDbCommand command = new OleDbCommand
                (
                    "SELECT PROBLEM ID, DateClosed, Full Name, RESPONSIBLE GROUP, CONTACT EMPLOYEE ID, CONTACT LAST NAME, CONTACT FIRST NAME, CONTACT EMAIL ADDRESS"+
                    "FROM [DAS Survey$]", conn
                );

            DataSet dsSurvey = new DataSet();
            OleDbDataAdapter surveyAdapter = new OleDbDataAdapter(command);
            surveyAdapter.Fill(dsSurvey);

            GrdVwSurvey.DataSource = dsSurvey.Tables[0];
        }