CallbackOnCollectedDelegate was detected on Walther MFS100 Check Scanner
<p>i am trying to programming an interface for Walther Mfs100 Check scanner but after the scan i get "CallbackOnCollectedDelegate was detected" error. How can i fix this. I use .net 2.0 with c# </p>

<pre><code>[DllImport("mflib.dll.stdcall")]
        public static extern int mfScanFeeder(int mode, int font, int timeout);

 retval = modMFS100.mfScanFeeder(0, 2,5000);
</code></pre>
