RB750 1 no as hotspot and DHCP and RB951G-2HnD -10 nos as AP

Please help to configure
I have 2 ADSL lines of 5 mb each wired to RB 750 routerboard on which I run hotspot for the users in the building through ethernet cable networked
My question is – i want to install wireless devices RB951G-2HnD in each floor of the building connected through ethernet cables and use these devices as access points for the users in the building and later stop using ethernet network
I still want to use RB750 as hotspot and give IP addresses to the users.
I tried to setup RB951G-2HnD with quick setup with winbox, I get the IP from RB750,but I cannot access when i am connected through access points…and also all the ethernet network users also cannot get to the Internet…I will get IP for all the devices, from RB750 …but no internet when I plug in the RB951G-2HnD as AP in the network
please help me?