obviously you can't expect ZF7782 to connect to ZD1100 having software 9.4.3, when minimum version supporting this AP iz 9.5.1. So you probably have to upgrade ZD to current software (9.6.2 will be the best), factory reset APs and try to connect them. You also need DHCP server on the network to provide IP addressing.
If APs still doesn't join ZD, try to connect to them through SSH (IP address you can find from DHCP server log by AP MAC), using default username/password super/sp-admin, and add command director IP X.X.X.X. Than everything must happen.
If still in problem -- ask support. But it really makes sense to read Release notes before installation (for example, if you have redundant configuration of ZD1100 you can brick secondary ZD if not fallow proceeding in upgrade manual).
Hope it helps,
Eizens