Hi Mohib,
Still i am standing in the same error. This is my error log from oxauth.log
2015-08-18 12:03:30,450 INFO [org.xdi.oxauth.auth.Authenticator] Authentication failed for 'client1'
2015-08-18 12:03:30,464 TRACE [org.xdi.oxauth.service.ClientService] Get client from cache by Dn 'inum=@!DE68.082C.9BB3.4E6E!0008!BC06.9C5C,ou=clients,o=@!DE68.082C.9BB3.4E6E!0001!E02F.AFA3,o=gluu'
2015-08-18 12:03:30,464 DEBUG [org.xdi.oxauth.service.ClientService] Found 1 entries for client id = @!DE68.082C.9BB3.4E6E!0008!BC06.9C5C
2015-08-18 12:03:30,469 TRACE [org.xdi.oxauth.service.ClientService] Get client from cache by Dn 'inum=@!DE68.082C.9BB3.4E6E!0008!BC06.9C5C,ou=clients,o=@!DE68.082C.9BB3.4E6E!0001!E02F.AFA3,o=gluu'
2015-08-18 12:03:30,469 DEBUG [org.xdi.oxauth.service.ClientService] Found 1 entries for client id = @!DE68.082C.9BB3.4E6E!0008!BC06.9C5C
2015-08-18 12:03:30,470 TRACE [org.xdi.oxauth.service.ClientService] Get client from cache by Dn 'inum=@!DE68.082C.9BB3.4E6E!0008!BC06.9C5C,ou=clients,o=@!DE68.082C.9BB3.4E6E!0001!E02F.AFA3,o=gluu'
2015-08-18 12:03:30,470 DEBUG [org.xdi.oxauth.service.ClientService] Found 1 entries for client id = @!DE68.082C.9BB3.4E6E!0008!BC06.9C5C
2015-08-18 12:03:46,080 TRACE [org.xdi.service.custom.script.CustomScriptManager] Last finished time '8/18/15 12:03 PM'
2015-08-18 12:04:16,080 TRACE [org.xdi.service.custom.script.CustomScriptManager] Last finished time '8/18/15 12:04 PM'
2015-08-18 12:04:46,074 TRACE [org.xdi.service.custom.script.CustomScriptManager] Last finished time '8/18/15 12:04 PM'