Nuendo 4: Too many tracks recording error

Hello all,

While recording on a 4 track recorder this message appears often - “Too many tracks recording”.
This is quite frustating, since the recording stops in the middle…

Can anyone help me out to fix it?

Thanks in advance.

System Specs?

Compaq CQ57

Windows 7 Premium (64 bits)
AMD E-300 APU 1.30 GHz