Hi.. thanks for your reply Mister_E.

I have this problem with both solutions!... i dont have two working devices when i connect them... i just have one! When i connect the second one the first connected doesnīt work!
My guess is that this happens because the handler of the first connected device is lost and replaced for the second one.. hence my sent data (from pc to device) is just received in one of the ports (this is for sure!) so it wouldnīt work to use the serial number because i canīt even get it :s.

The same reason for the second choice.

I also think that both devices could have exactly the same software, my guess is that this is a matter of software (in VB), there should be a way to create two different connections (what i call handlers) but i donīt get where this is done in the code Sub ConnectHID().

Again maybe i am thinking this wrong but this is what you would do with two diferent serial devices in different serial ports, you would have two different interrupt routines in the VB software to control each one.

I really hope someone could guide me here, has none connected two devices?

Thanks again for your time and concern,

DJC