When i click the capture Button 2nd time "Error: DP_Device_Failure" Using DPUru 5100

Question

I am using Digital Persona Uru 5100. When i tried to click the captur button for the first time it works correctly. But after closing the capture window and clicking again on capture button it generates error Error Screenshot Here

After clicking ok to this error 2nd error window popup

2nd Error Screenshot Here

can anyone tell me the solution of this problem? I am using code below to Open Reader

public bool OpenReader()
    {
        reset = false;
        Constants.ResultCode result = Constants.ResultCode.DP_DEVICE_FAILURE;

        // Open reader
        result = CurrentReader.Open(Constants.CapturePriority.DP_PRIORITY_COOPERATIVE);

        if (result != Constants.ResultCode.DP_SUCCESS)
        {
            MessageBox.Show("Error:  " + result);
            reset = true;
            return false;
        }

        return true;
    }