are you sure the addon file is loaded onto your tm ?
maybe reflash by the adviced procedure
1)back up channel list
2)factory reset
3)load original technomate firmware(can be got from technomate.uk download section)
4)factory reset
5)load latest patch (after this load latest addon )
6)factory reset
7)put back channellist and rescan all channels in use
if you don't use this method in between patches you might get stuck with bugs/problems on your tm
cause old bits of patches/firmware may remain in your tm.
Still no joy with code 8281 but after installing sotcam now get a CAS Menu and BISS Menu in system information when press 2004 on remote.
Is this Progress?
cas and biss menu would be part of patch(not the softcam), now when making sure these menu's are up and then go and watch a tv channel while watching a channel typ 8281 this will bring up the secret menu if you loaded the latest addon .