Delete top level files only

I'm trying to delete files from an IFS dir based on date, but only files at
the top level. This will be via a batch job, so I'm trying to do it via a
QSH command.

I tried this command:
find . -maxdepth 1 -not -type d -mtime +2 -exec rm -d {} \;

It gives me:
find: 001-2187 The option -maxdepth is not valid.

Via a bash shell, the -maxdepth switch works fine. Without that switch,
the QSH commands works, but it's recursive.

Any suggestions?

TIA