3.9.1942-1 tvheadend stops working after channel switch

[UkeHa]

I'm using the latest tvheadend from the repos on my ds214play.
With a newly started tvheadend there is a stream always turning on and off: http://i.imgur.com/wXHtoCD.png

Nontheless i can start watching a tv channel on my clients (latest OpenELEC or Windows 7 Client with XBMC running). But as soon as i change the channel Tvheadend HTSP Client loses connection (http://i.imgur.com/ONdcKjH.png) and also the webinterface isn't responding anymore.
Pluging the USB-TV-Stick as well as restarting the tvheadend-testing package are a possible fix. After restarting i can watch 1 channel, but as soon as i want to switch it stops working again. I've seen that the LED of the tv-stick stop lighting up as soon as the error happens.

I'll try if reinstalling/reconfiguring works

edit: After installing and trying to add channels to the muxes:

2014-10-26 20:02:11.730 service_mapper: bw/618/Eurosport360HD 3: failed [err No input detected]
2014-10-26 20:02:11.730 service_mapper: checking bw/442/sixx
2014-10-26 20:02:11.730 mpegts: 442 in bw - tuning on Sundtek DVB-C : DVB-C #0
2014-10-26 20:02:12.487 subscription: 006C: "service_mapper" subscribing on "none", weight: 6, adapter: "Sundtek DVB-C : DVB-C #0", network: "bw", mux: "442", provider: "Digital Free", service: "sixx"
2014-10-26 20:02:12.487 service_mapper: waiting for input
There seems to be a problem with the live update feed from Tvheadend. Trying to reconnect...

The problem seems to stem from tvheadend trying to reach oscam:

https://tvheadend.org/issues/2430

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