Deluge crash

[ibanez89]

every 2/3 hours dekuge crash and i need to reboot for re open io, why?

--Deluge Error--
DBusException : org.freedesktop.DBus.Error.ServiceUnknown: The name :1.14 was not provided by any .service files
path : /index
file : /var/lib/python-support/python2.5/dbus/connection.py in call_blocking, line 606

--Input--
<Storage {}>

--Versions--
WebUi : rev.172
Python : 2.5.2 (r252:60911, Apr 21 2008, 11:12:42)
[GCC 4.2.3 (Ubuntu 4.2.3-2ubuntu7)]
dbus:0.82.4

--Traceback--
File "/usr/share/deluge/plugins/WebUi/lib/webpy022/webapi.py", line 304, in wsgifunc
result = func()
File "/usr/share/deluge/plugins/WebUi/lib/webpy022/request.py", line 131, in <lambda>
func = lambda: handle(inp, fvars)
File "/usr/share/deluge/plugins/WebUi/lib/webpy022/request.py", line 61, in handle
return tocall(*([x and urllib.unquote(x) for x in args] + fna))
File "/usr/share/deluge/plugins/WebUi/webserver_framework.py", line 152, in deco
return func(self, name) #ok, continue..
File "/usr/share/deluge/plugins/WebUi/webserver_framework.py", line 136, in deco
res = func(self, name)
File "/usr/share/deluge/plugins/WebUi/webserver_framework.py", line 169, in deco
return func(self, name)
File "/usr/share/deluge/plugins/WebUi/deluge_webserver.py", line 103, in GET
for torrent_id in ws.proxy.get_session_state()]
File "/var/lib/python-support/python2.5/dbus/proxies.py", line 140, in __call__
**keywords)
File "/var/lib/python-support/python2.5/dbus/connection.py", line 607, in call_blocking
message, timeout)

This is from web plug in