check_by_ssh question

[Chris]

running on nagios 1.0 and already have many checks being done by ssh. today i decided to add a new check:
 
check_by_ssh!"/nagios/libexec/check_log2.pl -l /pathtolog.log -s /tmp/msgs.old -p "not found""
 
all my other check_by_ssh checks work just fine running as the user nagios.. however when this one runs it returns "unable to open pipe".. 
 
i'm not sure why this is being returned.. any clues?
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