ERROR: this copy of hashcat is outdated. Get a more recent version.

[bt5dean]

Hi,
i need help am using backtrack 5 and hashcat preinstall on it.
every time i open it i get this message: ERROR: this copy of hashcat is outdated. Get a more recent version.
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when i try to use it i get this:
root@bt:/pentest/passwords/hashcat# ./hashcat-cli64.bin -m 400 hash400.hash dict400.word

bash: ./hashcat-cli64.bin: cannot execute binary file

i don't know how to update to new version

Help me please
Thank you