Reset to factory configuration a DVR

Hello all; I come to this forum to ask for your help; I need to reset my dvr to the Factory configuration, because I changed the admin password and then I forgot it, so I can’t access to the functions. The model is VS101 from V-safe.
I have tested the common passwords like, 123456,123, 321 ,0000 etc. And this DVR don’t have any switch to reset the memory. I tried to remove the battery but only the hour goes to 0 but the passwords don’t changed.
Here the pictures of the DVR:

Thanks for your help
Asked Apr 10, 2013

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