Security Permission Problem with my ActiveX Control

Hi guys help please...I've created ActiveX Control using C# 2005 and I was able to compile it successfully but when i try to deploy it in our IIS server and open it thru my IE it shows an error.(Please see attached image) The error occured when I clicked the button btnLstRdr on my ActiveX Control. Any help please to solved this? Thanks in advance!

Code Snippet:

Code:

---

        private void btnLstRdr_Click(object sender, EventArgs e)
        {
            string[] rlist;           
            cmboReaderList.Items.Clear();
            if (FuncListReader(out rlist))
            {
                foreach (string str in rlist)
                {
                    if (str != "")                       
                        cmboReaderList.Items.Add(str);
                }
            }
        }

        public bool FuncListReader(out string[] readerList)
        {
            int ReaderCount = 255;
            byte[] retData;
            byte[] sReaderGroup = null;
            string readerStr = string.Empty;
            //string[] readerList;
            readerList = null;


            Common.retCode = ModWinsCard.SCardListReaders(Common.hContext, null, null, ref ReaderCount);

            if (Common.retCode != ModWinsCard.SCARD_S_SUCCESS)
            {
                FuncShowErrorMsg("Error getting list of reader.", ModWinsCard.GetScardErrMsg(Common.retCode), "Error getting reader list");
                return false;
            }

            retData = new byte[ReaderCount];

            //Get the list of reader present again but this time add sReaderGroup, retData as 2rd & 3rd parameter respectively.
            Common.retCode = ModWinsCard.SCardListReaders(Common.hContext, sReaderGroup, retData, ref ReaderCount);

            if (Common.retCode != ModWinsCard.SCARD_S_SUCCESS)
            {
                FuncShowErrorMsg("Error getting list of reader.", ModWinsCard.GetScardErrMsg(Common.retCode), "Error getting reader list");
                return false;
            }

            //Convert retData(Hexadecimal) value to String
            readerStr = System.Text.ASCIIEncoding.ASCII.GetString(retData);
            readerList = readerStr.Split('\0');

            return true;
        }


        [DllImport("winscard.dll", EntryPoint = "SCardListReadersA", CharSet = CharSet.Ansi)]
        public static extern int SCardListReaders(
            int hContext,
            byte[] Groups,
            byte[] Readers,
            ref int pcchReaders
            );

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