Help Playsms with Kannel

Please help me. Kannel and Playsms are both working but i have problem with Kannel DLR.
Playsms message are mark as sent but kannel DLR status are still in queued. ? why?
here is my config.

CORE

group = core

admin-port = 13000

smsbox-port = 13001

admin-password = password

status-password = password

log-file = “/var/log/kannel/kannel.log”

log-level = 0

access-log = “/var/log/kannel/access.log”

smsbox-max-pending = 100

sms-resend-retry = 1

dlr-storage = internal

store-type = file

store-file = /var/log/kannel/kannel.store

SMSBOX SETUP

group = smsbox

bearerbox-host = localhost

sendsms-port = 13013

global-sender = 13013

sendsms-chars = “0123456789+”

log-file = “/var/log/kannel/smsbox.log”

log-level = 0

access-log = “/var/log/kannel/access.log”

mo-recode = true

#---------------------------------------------

SMSC CONNECTIONS

#SMSC - ALL NETWORK

group = smsc

smsc = at

#port = 10000

smsc-id = allnetwork

modemtype = multi-modem-serial

device = /dev/ttyACM7

my-number = SIM NUMBER

sms-center = SIM SMS-CENTER

connect-allow-ip = “127.0.0.1, 192.168.254.2”

group = modems

id = multi-modem-serial

sendline-sleep = 500

no-pin = yes

keepalive-cmd = “AT+CMEE=1”

init-string = “AT+CMEE=1;+CGSMS=1;”

#---------------------------------------------

SEND-SMS USERS

SEND-SMS USERS

group = sendsms-user

username = pretextsms

password = password

concatenation = true

max-messages = 4

SMS SERVICE

group = sms-service

keyword = default

omit-empty = true

max-messages = 0

get-url = “http://localhost:5889/blackgate/index.php?app=call&cat=gateway&plugin=kannel&access=geturl&t=%t&q=%q&a=%a&Q=%Q&smsc=%i

Kannel Status:

Kannel bearerbox version 1.4.3'. Build Nov 24 2011 09:54:00’, compiler `4.6.2’. System Linux, release 3.19.0-56-generic, version #62~14.04.1-Ubuntu SMP Fri Mar 11 11:03:15 UTC 2016, machine x86_64. Hostname Skimfix-PC, IP 127.0.1.1. Libxml version 2.7.8. Using OpenSSL 1.0.0e 6 Sep 2011. Compiled with MySQL 5.5.17, using MySQL 5.5.47. Using SQLite 3.7.9. Using native malloc.

Status: running, uptime 0d 0h 37m 20s

WDP: received 0 (0 queued), sent 0 (0 queued)

SMS: received 3 (0 queued), sent 4 (0 queued), store size 0

SMS: inbound (0.00,0.00,0.00) msg/sec, outbound (0.00,0.00,0.00) msg/sec

DLR: 3 queued, using internal storage

Box connections:
smsbox:(none), IP 127.0.0.1 (0 queued), (on-line 0d 0h 37m 19s)

SMSC connections:
allnetwork AT2[allnetwork] (online 2219s, rcvd 3, sent 4, failed 0, queued 0 msgs)

as you can see the DLR queued was never cleared. but if i send directly using kannel http command ,not added on DLR queued.
My problem is Kannel DLR queued never clear after playsms message sent.