MissingManifestResourceException

I have a problem in my aplication. I am develoing software for a Windows CE .NET device. It is a bar code reader and I have the library that includes the control of the bar code scanner When I try to create an object of ScannerServicesDriver type I get a MissingManifestResourceException and no additional information is given. I don´t understand why can I create the object scanner1 correctly and not the scannerServicesDriver1. The path of reference to the library is correct This is the code I have: public class FormA200 : System.Windows.Forms.Form { ... private PsionTeklogix.Barcode.ScannerServices.ScannerServicesDriver scannerServicesDriver1; private PsionTeklogix.Barcode.Scanner scanner1; public FormA200() { InitializeComponent(); } private void InitializeComponent() { System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(FormA200)); this.lCant = new System.Windows.Forms.Label(); ..... this.scanner1 = new PsionTeklogix.Barcode.Scanner(); //at this point the exception happens! this.scannerServicesDriver1 = new PsionTeklogix.Barcode.ScannerServices.ScannerServicesDriver(); // scanner1 this.scanner1.Driver = this.scannerServicesDriver1; this.scanner1.ScanCompleteEvent += new PsionTeklogix.Barcode.ScanCompleteEventHandler(this.scanner1_ScanCompleteEvent); this.Load += new System.EventHandler(this.FormA200_Load); } private void scanner1_ScanCompleteEvent(object sender, PsionTeklogix.Barcode.ScanCompleteEventArgs e) {} } Any ideas? Thanks a lot