How to list OPOS Biometric devices installed?

[Carlosfer02]

I installed U.are.U 4500 fingerprint sensor drivers from here

Inside the folder it was installed it came with an OPOS project sample (created in visual basic) wich I already tested and it is working fine, so I tested my next code to get to work with the OPOS device:

List<string> retorno = new List<string>();
PosExplorer myPosExplorer = new PosExplorer();
DeviceCollection myDevices = myPosExplorer.GetDevices();
foreach (DeviceInfo dev in myDevices)
{
if (dev.Type == DeviceType.Biometrics)
{
retorno.Add(dev.ServiceObjectName);
}
}

For some reason this code does not find any biometric device. I know that this method work for other OPOS devices (like Msr, Scale, LineDisplay). But why it can not find the biometrics and the sample code it is able to do it? Am I missing something?

PS: I am working with c#, WPF and OPOS framework 1.14.

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