Maybe the binary is missing? Or hasn't the proper flags (I assume that you're logged as root)?
Anyway, this is bad for a distribution (especialy for essential bin utils)... sadly.
The great thing about BSD is that you can "borrow" any distribution/*niX binary for the same architecture (AthlonXP in your case), and simply replace the missing/malfunctioning one (binary compatibility, no matter for what kernel was compiled).
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