This is the connection of a PostgreSQL database to a function which get the details and create database record

public bool USERPWDHISTORYInsert(string[] connectionValues, USERPWDHISTORYDTO oSUSERPWDHISTORYDTO)
{
    bool result = false;

    try
    {
        using (DBConnector oCloudConnection = new DBConnector(connectionValues[0], Convert.ToInt32(connectionValues[1])))
        {         
            StringBuilder varname1 = new StringBuilder();
            varname1.Append("INSERT INTO SUSERPWDHISTORY n");
            varname1.Append("( n");
            varname1.Append("USER_ID, n");
            varname1.Append("USER_PASSWORD, n");
            varname1.Append("CREATED_DATETIME, n");
            varname1.Append("CREATED_USER, n");
            varname1.Append("CREATED_USER_CC, n");
            varname1.Append("CREATED_MACHINE, n");
            varname1.Append("CREATED_MACHINE_IP, n");
            varname1.Append("MODIFIED_DATETIME, n");
            varname1.Append("MODIFIED_USER, n");
            varname1.Append("MODIFIED_USER_CC, n");
            varname1.Append("MODIFIED_MACHINE, n");
            varname1.Append("MODIFIED_MACHINE_IP n");
            varname1.Append(") n");
            varname1.Append("VALUES n");
            varname1.Append("( n");
            varname1.Append(":USER_ID, n");
            varname1.Append(":USER_PASSWORD, n");
            varname1.Append(":CREATED_DATETIME, n");
            varname1.Append(":CREATED_USER, n");
            varname1.Append(":CREATED_USER_CC, n");
            varname1.Append(":CREATED_MACHINE, n");
            varname1.Append(":CREATED_MACHINE_IP, n");
            varname1.Append(":MODIFIED_DATETIME, n");
            varname1.Append(":MODIFIED_USER, n");
            varname1.Append(":MODIFIED_USER_CC, n");
            varname1.Append(":MODIFIED_MACHINE, n");
            varname1.Append(":MODIFIED_MACHINE_IP n");
            varname1.Append(")");

            oCloudConnection.CommandText = varname1.ToString();
            oCloudConnection.Parameters.Clear();
            oCloudConnection.Parameters.Add(new Parameter { Name = "USER_ID", Value = oSUSERPWDHISTORYDTO.USER_ID });
            oCloudConnection.Parameters.Add(new Parameter { Name = "USER_PASSWORD", Value = oSUSERPWDHISTORYDTO.USER_PASSWORD ?? (object)DBNull.Value });
            oCloudConnection.Parameters.Add(new Parameter { Name = "CREATED_DATETIME", Value = oSUSERPWDHISTORYDTO.CREATED_DATETIME });
            oCloudConnection.Parameters.Add(new Parameter { Name = "CREATED_USER", Value = oSUSERPWDHISTORYDTO.CREATED_USER });
            oCloudConnection.Parameters.Add(new Parameter { Name = "CREATED_USER_CC", Value = oSUSERPWDHISTORYDTO.CREATED_USER_CC });
            oCloudConnection.Parameters.Add(new Parameter { Name = "CREATED_MACHINE", Value = oSUSERPWDHISTORYDTO.CREATED_MACHINE });
            oCloudConnection.Parameters.Add(new Parameter { Name = "CREATED_MACHINE_IP", Value = oSUSERPWDHISTORYDTO.CREATED_MACHINE_IP });
            oCloudConnection.Parameters.Add(new Parameter { Name = "MODIFIED_DATETIME", Value = oSUSERPWDHISTORYDTO.MODIFIED_DATETIME });
            oCloudConnection.Parameters.Add(new Parameter { Name = "MODIFIED_USER", Value = oSUSERPWDHISTORYDTO.MODIFIED_USER });
            oCloudConnection.Parameters.Add(new Parameter { Name = "MODIFIED_USER_CC", Value = oSUSERPWDHISTORYDTO.MODIFIED_USER_CC });
            oCloudConnection.Parameters.Add(new Parameter { Name = "MODIFIED_MACHINE", Value = oSUSERPWDHISTORYDTO.MODIFIED_MACHINE });
            oCloudConnection.Parameters.Add(new Parameter { Name = "MODIFIED_MACHINE_IP", Value = oSUSERPWDHISTORYDTO.MODIFIED_MACHINE_IP });
            if (oCloudConnection.ExecuteQuery() > 0)
            {
                result = true;
            }
        }
        return result;
    }
    catch (Exception ex)
    {
        DMSLogger.Write(ex);
        return false;
    }
}

I wanted to know if this code is correct because when I insert data from the application this dose not work and shows the error and other functions are correct this is the only thing I suspect to be wrong