C#

string MyConStr = "Provider=VFPOLEDB.1; Data Source='C:\\Temp'; Persist Security Info=False";  
VFPDAp = new OleDbDataAdapter(); 
VFPDAp.InsertCommand = new OleDbCommand(); 
VFPDAp.UpdateCommand = new OleDbCommand();  
VFPDAp.InsertCommand.CommandText = "insert into my_table1 (my_time,reminder) values(?, ?, ?)"; 
VFPDAp.UpdateCommand.CommandText = "update my_table1 set my_time=?, reminder=? where sl_no=? ";  
VFPDAp.InsertCommand.Connection = OleCon1; 
VFPDAp.UpdateCommand.Connection = OleCon1;   
OleDbParameter Par1 = new OleDbParameter("my_time", -1); 
Par1.DbType = DbType.String; 
Par1.SourceColumn = "my_time"; 
Par1.ParameterName = "my_time";  
OleDbParameter Par2 = new OleDbParameter("reminder", -1); 
Par2.DbType = DbType.String; 
Par2.SourceColumn = "reminder"; Par2.ParameterName = "reminder";  
OleDbParameter Par3 = new OleDbParameter("my_time", -1); 
Par3.DbType = DbType.String; 
Par3.SourceColumn = "my_time"; 
Par3.ParameterName = "my_time";  
OleDbParameter Par4 = new OleDbParameter("reminder", -1); 
Par4.DbType = DbType.String; 
Par4.SourceColumn = "reminder"; 
Par4.ParameterName = "reminder";  
VFPDAp.InsertCommand.Parameters.Add(Par1); 
VFPDAp.InsertCommand.Parameters.Add(Par2); 
VFPDAp.UpdateCommand.Parameters.Add(Par3); 
VFPDAp.UpdateCommand.Parameters.Add(Par4);  
OleCon1.ConnectionString = MyConStr; 
OleCon1.Open(); 
VFPDAp.Update(VfpTbl); //============> SQL: Column 'Q0P2' is not found 
OleCon1.Close();