C++ 11 multi-thread merge sort with error “no instance of contructor 'std::thread' matches the argument list”

I want to write a small program to learn C++ 11 multi-thread program. so I decided to write a mergeSort to test it.

Here is my code:

void mergeSort(int a[], int low, int high)
{
    if (high <= low)
    {
        return;
    }
    int mid = low + (high - low) / 2;

    //single_thread
    /*mergeSort(a, low, mid);
    mergeSort(a, mid + 1, high);
    merge(a, low, high);*/

    //multi_thread
    thread left(mergeSort, a, low, mid);
    thread right(mergeSort, a, mid + 1, high);
    left.join();
    right.join();

    merge(a, low, high);

}

But when I complier the code in VS2015, it will throw an error that no instance of constructor "std::thread" matches the argument list.

can you help me find the problem with my code?

Thx