Here is a snippet of my log.
jan/02/1970 00:00:29 wireless,info 00:12:17:95:6E:B6@wlan1: connected
jan/02/1970 00:00:31 dhcp,info dhcp2 deassigned 10.11.12.254 from 00:12:17:95:6E:B6
jan/02/1970 00:00:31 dhcp,info dhcp2 assigned 10.11.12.254 to 00:12:17:95:6E:B6
jan/02/1970 00:00:38 hotspot,info,debug 00:12:17:95:6E:B6 (10.11.12.254): trying to log in by mac
jan/02/1970 00:00:38 radius,debug new request 3f:22 code=Access-Request service=hotspot called-id=hotspot1
jan/02/1970 00:00:38 radius,debug sending 3f:22 to 66.xx.xx.xx:1812
jan/02/1970 00:00:38 radius,debug,packet sending Access-Request with id 4 to 66.xx.xx.xx:1812
jan/02/1970 00:00:38 radius,debug,packet Signature = 0x867f64519ce6f03fd34ef47444a3b29f
jan/02/1970 00:00:38 radius,debug,packet NAS-Port-Type = 19
jan/02/1970 00:00:38 radius,debug,packet Calling-Station-Id = "00:12:17:95:6E:B6"
jan/02/1970 00:00:38 radius,debug,packet Called-Station-Id = "hotspot1"
jan/02/1970 00:00:38 radius,debug,packet NAS-Port-Id = "wlan1"
jan/02/1970 00:00:38 radius,debug,packet User-Name = "00:12:17:95:6E:B6"
jan/02/1970 00:00:38 radius,debug,packet NAS-Port = 2157969408
jan/02/1970 00:00:38 radius,debug,packet Acct-Session-Id = "80a00000"
jan/02/1970 00:00:38 radius,debug,packet Framed-IP-Address = 10.11.12.254
jan/02/1970 00:00:38 radius,debug,packet MT-Host-IP = 10.11.12.254
jan/02/1970 00:00:38 radius,debug,packet CHAP-Challenge = 0xbb0a79438611d2b704e0ca3465a6b5cd
jan/02/1970 00:00:38 radius,debug,packet CHAP-Password = 0x64a1f268eee6924df2ccae0c212ad885
jan/02/1970 00:00:38 radius,debug,packet bd
jan/02/1970 00:00:38 radius,debug,packet Service-Type = 1
jan/02/1970 00:00:38 radius,debug,packet WISPr-Logoff-URL = "http://10.11.12.1/logout"
jan/02/1970 00:00:38 radius,debug,packet NAS-Identifier = "MikroTik"
jan/02/1970 00:00:38 radius,debug,packet NAS-IP-Address = 172.17.0.55
jan/02/1970 00:00:38 radius,debug,packet received Access-Reject with id 4 from 66.xx.xx.xx:1812
jan/02/1970 00:00:38 radius,debug,packet Signature = 0xcbe411677dba740f233e95556bbfc03b
jan/02/1970 00:00:38 radius,debug,packet Reply-Message = "Your Account '00:12:17:95:6E:B6' is Inactive"
jan/02/1970 00:00:38 radius,debug received reply for 3f:22
jan/02/1970 00:00:38 hotspot,info,debug 00:12:17:95:6E:B6 (10.11.12.254): login failed: Your Account '00:12:17:95:6E:B6' is Inactive
jan/02/1970 00:00:41 radius,debug sending 05:00 to 66.xx.xx.xx:1813
jan/02/1970 00:00:41 radius,debug,packet sending Accounting-Request with id 5 to 66.xx.xx.xx:1813
jan/02/1970 00:00:41 radius,debug,packet Signature = 0x1e07a3928be46100c561762bd56aac98
jan/02/1970 00:00:41 radius,debug,packet Acct-Status-Type = 7
jan/02/1970 00:00:41 radius,debug,packet NAS-Identifier = "MikroTik"
jan/02/1970 00:00:41 radius,debug,packet NAS-IP-Address = 172.17.0.55
jan/02/1970 00:00:41 radius,debug,packet Acct-Delay-Time = 0
jan/02/1970 00:00:41 radius,debug,packet received Accounting-Response with id 5 from 66.xx.xx.xx:1813
jan/02/1970 00:00:41 radius,debug,packet Signature = 0xe4e2c80933f4d3a877e5b8cbb2dc10db
jan/02/1970 00:00:41 radius,debug received reply for 05:00
Now look at the Reply-Message from radius server and then a couple lines down in the hotspot, info, debug also says it for hotspot.. problem is... its not making it into the page for the $error variable