I would suggest setting it back to defaults (ensuring you have latest firmware as usual).
Then use quickset and select AP WISP mode.
After that all you need to do is
a. create bridge
b. Add vlans
c. Add vlans to the bridge
d. configure the bridge ports and bridge vlan
e. configure wireless.
As for the bridge leave the pvid to default of 1 and use vlans to describe all subnets as required.
For the physical ports on the bridge that you are going to use dont forget that
1 - trunk ports just add port to the bridge
2- access ports add vlan and identify as access port by stating pvid number of associated vlan
For the wireless ports on the bridge (we call them WLANS)
3- add WLANS (access ports) to the bridge as well, since all receiving devices are not vlan aware these WLANS are all access ports and thus required the PVID number.
4- Now you will have to go back to bridge vlan settings and modify to include the WLANs.
Suggest before doing anything that you read this reference in general (the intro pages and diagrams) and the review and understand the configuration associated with the AP only example, thread #4
http://forum.mikrotik.com/t/using-routeros-to-vlan-your-network/126489/1