Hello, 

on MC2180 (WindowsCE 6.0) we have sometimes this problem: Wireless Fusion scan don't found any wireless infrastructure networks (even though they exist in good quality) and we have to restart the device. Then SCAN wifi network work again. On devices we have firmware version 4.34.130 and Fusion version X_2.01.2.0.002R. Any tip will be helpful. We use Fusion API in our application for scan networks:

      myWlan.Adapters[0].NDIS.BSSIDList.Scan();
      myWlan.Adapters[0].NDIS.BSSIDList.Get();
      foundNetworks = myWlan.Adapters[0].NDIS.BSSIDList.BSSIDList;