Copy constructor is being called instead of the move constructor

Question

I'm trying to use the new C++11 move semantics, but the copy constructor gets called every time... Does anyone know what am I doing wrong? I'm using VS2012. Thanks in advance!

MemoryBlock::MemoryBlock(MemoryBlock& other)
: m_capacity(other.m_used), m_used(other.m_used), m_pointer(nullptr) {
    std::wcout << L"Copy constructor called" << std::endl;
    // ...
}

MemoryBlock& MemoryBlock::operator=(MemoryBlock& other) {
    std::wcout << L"Copy assignment called" << std::endl;
    if (this != &other) {
        // ...
    }
    return *this;
}

MemoryBlock::MemoryBlock(MemoryBlock&& other)
: m_capacity(other.m_capacity), m_used(other.m_used), m_pointer(other.m_pointer) {
    std::wcout << L"Move constructor called" << std::endl;
    // ...
}

MemoryBlock& MemoryBlock::operator=(MemoryBlock&& other) {
    std::wcout << L"Move assignment called" << std::endl;
    if (this != &other) {
        // ...
    }
    return *this;
}

MemoryBlock CreateRequest(const wchar_t *action) {
    MemoryBlock request;
    // ...
    return request;
}

int __cdecl wmain(int argc, wchar_t *argv[]) {
    // ...
    MemoryBlock request = CreateRequest(argv[1]);
    // ...
}