CC3220SF-LAUNCHXL: How to run two mqtt client

We are going to use two mqtt client parallel.

1) Normal TLS based MQTT

2)Watson IoT

if i run two client parallel one(mqtt)  MQTTClient_create return success and another one(watson iot) return error why return error ?

Normal MQTT :

    MqttClient_params.clientId = ClientId;
    MqttClient_params.connParams = &Mqtt_ClientCtx;
    MqttClient_params.mqttMode31 = MQTT_3_1;
    MqttClient_params.blockingSend = true;

    /* Initialize MQTT client lib                   */
    WiFi_Connect.mqttClientHandle = MQTTClient_create(MqttClientCallback,
                                                       &MqttClient_params);
    if (WiFi_Connect.mqttClientHandle == NULL)
    {
        UART_PRINT("[MQTT Thread] Error - MQTT client handle is null \r\n");
        return -1;
    }

Watson IoT : 

IBMClient_params.clientId = IBM_ClientId;
    IBMClient_params.connParams = &IBM_ClientCtx;
    IBMClient_params.mqttMode31 = MQTT_3_1;
    IBMClient_params.blockingSend = true;

    /* Initialize Watson_IoI Client Lib */
    WiFi_Connect.IBM_ClientHandle = MQTTClient_create(IBMClientCallback,
                                                      &IBMClient_params);
    if (WiFi_Connect.IBM_ClientHandle == NULL)
    {
        /* Lib initialization failed */
        UART_PRINT("[IBM Thread] Error - MQTT client handle is null \r\n");
        return -1;
    }

I having doubt on this one also 

MQTTClient_run((MQTTClient_Handle) pvParameters);

Questions :

1. Why i am getting error on another one MQTTClient_create call ?
2. one mqtt (SLNETIF_ID_2) another one (SLNETIF_ID_3) this is correct ?
3. MQTTClient_run can i pass handle directly why example code passing pvParameters  instant of handle ?
4. Maximum how many mqtt client we can run parallel ?

Please help me to solve this issue.

Thank You

  Vasu