At a guess you may be running into something like Macrovision that used to block DVD record or play through a VCR.
There is a site called Video Help (Google for actual name) that had all sorts of hints for removal of Country codes, HDD replacements etc on various machines.
You may need to become a member but it was free and well worth taking a few minutes to do it.
If you do go there, note your recorder could be listed under a different model but will be the same as sold here.
I believe that apart from some non standard formats being used in recording, the manufactures are doing their best to prevent any recordings made on one devise being transferred to another unless it suits them.
All the new flatscreen TV's I have that allow USB Record facilities will only record from the Digital Terrestrial channel and the TV must be left turned on, picture and all during the recording period.
I only noted the other day is another similar forum (swapping USB/HDD devises between STB/TV's) how much harder it is to record and playback now we are all 'Digital' than it was with the plain straight forward VCR's we have now thrown out !!.
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