Problem oscilloscope PCSU200

Hi, I have a PCSU200 I forget calibrate the oscilloscope there is a calibration error message failed. I did what was written on the forum but nothing will. I tried sue two computer (XP and windowns 7). What can I do?

You can return the PCSU200 for repair via your local Velleman dealer or direct to:

Velleman Projects Tech. Dept.
Legen Heirweg 33
9890 Gavere