MICROTIK routerboard wap problem DHCP :?

Hello.
Good Morning.
I’ve been tinkering with a Microtik wAp routerboard through winbox to set it up as a simple hotspot and I’m having problems in what with other access points is very simple.
With this hardware I do not know how to make it work well.
I explain:
In my network there is a DHCP server and I would simply want the “Microtik routerboard wAp” to act as an access point and only allocate a pool of IP addresses already established for the people that connect to that antenna and in another area with another equal antenna, Something similar but with another DHCP range, and so on.
The simplest way I’ve seen is to put it as Wish ap or home AP and bridge mode from winbox and there configure the parameters, but at the time of putting the dhcp in the AP only let me put it in the bridge interface and prioritize the dhcp server that is already On the network interface and gives me both dhcp server and AP addresses. If I put the DHCP server on the wlan1 interface it gives me that the configuration is invalid and it does not serve me.
If I put it as Router mode as I lose visibility of the computers between what is supposedly wan and lan connection and the network configuration changes for the clients since the gateway becomes the access point and I do a lio testing without success.
I would like to know if anyone knows how to set this up or you can think of something they might be doing wrong.
Thank you very much
esquema AP Microtik.JPG