at command with parameters

Hello,

My probleme is with the at command, i try to add some parameters, and this generat a syntaxe error
here is my command :
at $(date -d "$9 $8" "+%H:%M %m/%d/%y") -f email.sh $1 $2 $3, I tried also at $(date -d "$9 $8" "+%H:%M %m/%d/%y") -f email.sh "$1 $2 $3", but it give the same probleme

error : syntax error. Last token seen: t
Garbled time
(it work without parameters)
have you got any idea about this ? il looked for this a lot, il didn't find any example whitch use at with parameters
thank you in advance

Regards