No. You have to use the DHCP under system.
I just saw you using a vlan 108
Does that vlan 108 just exist in the virtual controller?
If it does just exist in the virtual controller then instead of putting a vlan assigment on the configuration of the VAP use virtual controller assigment(that will use the dhcp server under system) and thats the one you need
Now i dont know why Aruba Make it like that, both should have that option! :)
Cheers
Carlos