Tsung. How to continue use the previous Jabber session after HTTP switching to and back? - tsung

Question

I'm trying to create load testing scenario with tsung. I need to use 2 types of session: ts_jabber and ts_http. May I continue use Jabber session after HTTP switching to and back?
This is my code:
<sessions>
<session probability="100" name="session1" type="ts_http">
//some code
<change_type new_type="ts_jabber" host="*****" port="5222" server_type="tcp" store = "true"/>
<request subst="true">
<jabber type="connect" ack="local">
<xmpp_authenticate username="%%_loginForChat%%" passwd="%%_password%%"/>
</jabber>
</request>
<thinktime value="10"></thinktime>
<transaction name="authenticate">
<request>
<jabber type="auth_sasl" ack="local"></jabber></request>
<request>
<jabber type="connect" ack="local"></jabber> </request>
<request>
<jabber type="auth_sasl_bind" ack="local" ></jabber></request>
<request>
<jabber type="auth_sasl_session" ack="local" ></jabber></request>
</transaction>
<change_type new_type="ts_http" host="******" port="80" server_type="tcp"
//some code
<change_type new_type="ts_jabber" host="*******" port="5222" server_type="tcp" />
<request subst="true">
<jabber type="muc:join" ack="local" room="%%_app_id%%_%%_groupChat_room_id%%" nick="%%_loginForChat%%"/>
</request>
</session>
After run this code i get an error: "Error: Unknown msg {tcp_closed, #Port<0.1183>} receive in state wait_ack, stop"
Help me, please.