Alpine virtualbox and two network cards: NAT and host-only

Hi,
I have tried to configure network in an alpine installed in a virtualbox VM. Host OS is Windows 7.
In VM I selected 2 cars: NAT and host-only.
eth0 is NAT and eth1 is host-only
eth0 is configured as:
auto eth0
iface eht0 inet dhcp
hostname alpine

instead eht1:
auto eth1
iface eth1 inet static
gateway 192.168.56.101
netmask 255.255.255.0
address 192.168.56.150

With this configuration only eht1 works, I can pint guest from host but I have no internet connection.
I must comment eth1 and reboot the vm to have internet connection using eth0.

How can I use both network card at the same time without problem?

Thanks!