After working days without problem Icecast 2.4.4 not trying to update relays from master server

[ghost]

this my icecast.xml config:

<icecast>
    <location>Iran</location>
    <admin>info@myts3.ir</admin>

    <limits>
        <clients>50000</clients>
        <sources>1000</sources>
        <queue-size>307200</queue-size>
        <client-timeout>30</client-timeout>
        <header-timeout>600</header-timeout>
        <source-timeout>600</source-timeout>
        <burst-on-connect>1</burst-on-connect>
        <burst-size>196608</burst-size>
    </limits>

    <authentication>
        <source-password>removed</source-password>
        <relay-password>removed</relay-password>
        <admin-user>admin</admin-user>
        <admin-password>removed</admin-password>
    </authentication>

    <hostname>radio.myts3.ir</hostname>

    <listen-socket>
        <port>18000</port>
    </listen-socket>

    <http-headers>
        <header name="Access-Control-Allow-Origin" value="*" />
    </http-headers>

    <master-server>192.168.100.53</master-server> 
    <master-server-port>8000</master-server-port> 
    <master-update-interval>30</master-update-interval>
    <master-password>removed</master-password>
    <relays-on-demand>0</relays-on-demand>

    <fileserve>1</fileserve>

    <paths>
        <basedir>/usr/share/icecast</basedir>
        <logdir>/var/log/icecast</logdir>
        <webroot>/usr/share/icecast/web</webroot>
        <adminroot>/usr/share/icecast/admin</adminroot>

        <alias source="/" destination="/status-json.xsl"/>
    </paths>

    <logging>
        <accesslog>access.log</accesslog>
        <errorlog>error.log</errorlog>
        <loglevel>4</loglevel>
        <logsize>100000</logsize>
    </logging>

    <security>
        <chroot>0</chroot>
    </security>
</icecast>

i have logs too, its 66mB i can't send it here.