Addons won't run

[griv]

Software
XBian version: latest
XBMC version: latest
Overclock settings: default

Hardware
Power supply rating: 1000
RPi model (model A/B 256mb/512mb): B+
SD card size and make/type: SanDisk SDSDQU-008G-FFP 8 GB
Network (wireless or LAN): Wireless
Connected devices (TV, USB, network storage, etc.): TV, USB 3 Drive

Logile
Link to logfile(s):
http://pastebin.com/kiSPS2d8

Problem description:

Hi,

I have tried installing two add ons ("File cleaner" and "after watch") and neither of them will run, they have installed successfully and I can configure them ok, but they don't actually run, I've attached my log above, thank you kindly for any help