[C++] USB gadget driver, unbound kernel driver?

Hello Folks,

I try to write my own usb driver for my usb gadget, I write it on linux ubuntu with the libusb library. at this point i am able to setup a connection to the device but when i try to set a actice configuration it gives me a error:

Device or resource busy.

so i looked at google and found the following topic:
topic

at the end of all the replies, the topic starter said that the problem was a kernel driver that was automatically attached tot the device and he had to unbound it with the following command:

Code:

---

rsmod hid

---

my question is:

1. does somebody knows libusb and knows what the problem could be?
2. can somebody confirm that kernel drivers could be the problem, and needed to be unbound ?
3. does somebody know the command of "rsmod hid" for a ubuntu system because this command doesn't work for me.

Thanks in advanced,

Jelte.

Code:

---

/*
 * main.cpp
 *
 *  Created on: 30 dec 2009
 *      Author: jelte
 *
 * USB Missle launcher info:
 * id-product:        514  -        0x1130
 * id-vendor:        4400 -        0x0202
 */

#include <usb.h>
#include <iostream>

usb_dev_handle *locate_misslelauncher(void);

using namespace std;

int main()
{
        struct usb_dev_handle *misslelauncher_handle;

        usb_init();
        usb_set_debug(2);

        if((misslelauncher_handle = locate_misslelauncher()) == 0)
        {
                cout << "cannot open device!" << endl;
        }
        else
        {
                cout << "device open!" << endl;
                int configstatus = 0;

                configstatus = usb_set_configuration(misslelauncher_handle,5);

                if(configstatus == 0)
                {
                        cout << "set config succeeded!" << endl;
                }
                else
                {
                        cout << "set config failed" << endl;
                }
        }
        usb_close(misslelauncher_handle);
        return 0;
}

usb_dev_handle *locate_misslelauncher(void)
{
        unsigned int vendorid = 4400;
        unsigned int productid = 514;
        unsigned int located = 0;

        struct usb_bus *bus;
        struct usb_device *device;
        usb_dev_handle *devicehandle = 0;

        usb_find_busses();
        usb_find_devices();

        for(bus = usb_busses;bus;bus = bus->next)
        {
                for(device = bus->devices;device; device = device->next)
                {
                        if(device->descriptor.idVendor == vendorid && device->descriptor.idProduct == productid)
                        {
                                        located++;
                                        devicehandle = usb_open(device);
                        }
                }
        }

        if(devicehandle == 0)
        {
                return (0);
        }
        else
        {
                return (devicehandle);
        }
}

---