Importing Excel file error: System.Data.OleDb.OleDbException (0x80004005)

System.Data.OleDb.OleDbException (0x80004005): Unspecified error at System.Data.OleDb.OleDbConnectionInternal..ctor(OleDbConnectionString constr, OleDbConnection connection) at System.Data.OleDb.OleDbConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningObject) at System.Data.ProviderBase.DbConnectionFactory.CreateNonPooledConnection(DbConnection owningConnection, DbConnectionPoolGroup poolGroup) at System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) at System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) at System.Data.OleDb.OleDbConnection.Open()

string strPath = @"D:\inetpub\wwwroot\cfxTemp\BuildingScorecardTemplate2014321115842072920729.xlsx"


if (!File.Exists(strPath))
{
    file.SaveAs(strPath, true);
}

string strConn =  "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + strPath + ";Extended Properties=\"Excel 12.0;HDR=Yes;IMEX=1;FMT=Delimited\"";

string worksheetName = "";
OleDbConnection conn = new OleDbConnection(strConn);
conn.Open();
DataTable dtNew;
dtNew = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);


conn.Close();