If you are using the WAPAC as an accesspoint/switch then stop configuring it like a router and use the bridge vlan method and it will work very easily.
a. use bridge
b. assign all vlans to the bridge
c. configure bridge port settings etherports and wlans
d. configure bridge vlan settings
e. set IP address of the wapac to be on the management vlan
f. ensure ip discovery is the managment vlan
g. ensure winbox macserver is set to the management vlan
h. ensure one ip route exists to the management vlan gateway IP of the device
Done!
Us this guide for access point… (see access point example)
http://forum.mikrotik.com/t/using-routeros-to-vlan-your-network/126489/1