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Question: Does Acer Aspire 5738,processor T600 has hardware virtualization

I have a l Acer aspire laptop. Model 5738 T600 (2.2 GHz)
with system bios version 1.3, VGA bios bersion 3.13.
In my host operation system i.e. windows 7 64 bit I have installed sun java virtual box 64 bit. But I was unable to install 64-bit Debian lenny as a guest.
It was showing that the required kernel x86_64 and mine is i686. I have no option in bios to enable hardware virtualization(intel vt-x/amd64).
Please let me know how can I run 64 bit guest in 64-bit host?