C# SCardControl return code 1

This is my first attempt in using a card reader in C#, or basically anywhere.

I use ACS ACR122U PICC Interface 0 reader in Windows 7 64bit.

My first problem occurs when I tried to connect to the reader using

ModWinsCard.SCardConnect(hContext, cbReader.SelectedItem.ToString(), ModWinsCard.SCARD_SHARE_DIRECT, 0, ref hCard, ref Protocol);

It returns error code 6, but I googled and solved it by changing project's platform from Any CPU to X86.

Right after that I bumped to another issue, this time in controlling the reader.

I tried with :

_sentBuffer = new byte[]
    {
         0xFF,
         0x00,
         0x48,
         0x00,
         0x00
    };
_receivedBuffer = new byte[10];

_receivedBuffer[0] = 0;

_returnCode = ModWinsCard.SCardControl(_hCard, _dwControlCode, ref _sentBuffer[0], _sentBuffer.Length, ref _receivedBuffer[0], _receivedBuffer.Length, ref bytesReturned);

The returned code is 1, which is weird because I can't found it in the documentation.

Really need a hand in this.

Thanks !

Solution

I somehow have it solved by downloading the latest driver from the provider's website, with uninstalling the driver that is included in the driver CD.

Still wonder what does return 1 means though..