hello guys
i have a hap lite conected to internet called (ap A)
then i connected another hap lite (ap B) to ap A
these are configured as access point
ap B gets internet from its ethere 1
now i want to connect radio sxtsq lite to ap B via ether 2 (ap B) transfer intrnet
when i connect radio sxtsq to ap B, the ap B disconnect itself from ap A and there is no internet
it is needed to say that dhcp in ap A is enabled and firewall rul is in place and ap B acts as a simple ap

diagram is like this
internet --> hap lite (ap A) --> hap lite (ap B) --> Radio SXTsq
please guide me to configure it
thanx in advance