MC67 with RFD5500 Can't find PInvoke DLL 'rfidapi32.dll'.

I've got Motorolla MC67 and RFID reader RFD5500.

Downloaded latest EMDK for .Net and update EMDKs_Update_SPR_26261

Using Visual Studio 2008

 

Any of the examples of RFID applications coming with EMDK throws an exception  "Can't find PInvoke DLL 'rfidapi32.dll'   when m_ReaderAPI.Connect()  is executed.

 

What do I miss ? Should I install drivers or something else to MC67 to support RFID scanners ?  It has Windows Mobile 6.5.

 

Thank you in advance for any help or suggestions.