It says I can not record pick the asio duplex but i don't know how
What recording software are you using? What version of Windows are you on? The ASIO driver for the Lambda should have been installed when you loaded the software that it came with, and if so there should be a control panel that will allow you to select that. The other option is to use ASIO4ALL. It is a free ASIO driver that works really well for most sound cards and software instruments and recording software like Cubase, Nuendo or the many other programmes out there.
If you need more help let me know.