Memory Allocation Crash

[gallilaw]

Running Windows 7 RC in WinXP host on a Lenovo Thinkpad T60.

When I had 2 megs of memory (2048) I gave 1024 each to guest and host, and the Win 7 machine started OK.

I upgraded to 3072 megs of memory.

If I give 1024 to XP and 2048 to the Win 7 guest, the system crashes spitting out a memory allocation error.

If I give 1536 to each, no crash.

I had hoped to really boost the memory in Win 7.

Is there a reason why the guest memory allocation may not exceed the host's?

[vbox4me2]

First run a memory test program to make sure the Host ram is ok.

[gallilaw]

Ran Memtest for lots of cycle with no errors reported.

[vbox4me2]

Specific error message? vbox version? if you haven't try vbox 3.0.2