I have basebox 5 we are configured with wpa2 security with wisp ap mode when we are connect sxt5 on basebox with client it's sgows error unicast key exchange timeout please help me this issues coming from 5 days.

In my experience - if Unicast is the _only_ error You are getting = password / auth-setting error
If You are also getting a mix of Group key disconnect, Data Loss disconnect etc = too bad signal / noise / whatever Communications problem