maeg-ras , i'll suggest you repeat the format procedure using Disk Tools again, guide here
http://www.mympxplayer.org/how-to-re...ck-vt2400.html
There are a few reasons for what you are experiencing:
1. Incorrect formatting using Disk Tools (encryption not set to zero).
2. Wrong serial number printed by Samsung on memory chip.
3. Serial number deliberately modified by manufacturers/sellers.