QNX-6.2.0 recognizes only 64MB of memory


I am running QNX-6.2.0 NC on Pentium-2/350 MHz target board with
512 MB of RAM. However, when I connect Momentics PE (hosted on
Windows 2000 workstation) to this target board, Momentics’
System Information view shows only 64 MByte of memory. Is it
a limitation of NC edition of Momentics ? Note that upon
installing QNX-6.2.0 NC onto this target, I replaced target’s
/.boot with the one that I have built with Momentics’s PE,
but it didn’t help - target still reports only 64 MB of RAM.
How do I make it to recognize all 512MBytes of memory ?

Thanks in advance and regards,