problem with fitdistr ?

Hi,

I'm trying fitdistr but I'm getting some errors

fitdistr(rnorm(100),"Normal")

Error in fitdistr(rnorm(100), "Normal") : 'start' must be a named list

fitdistr(rnorm(100),"Normal",start=list(mean=0,sd=1))

Error in fitdistr(rnorm(100), "Normal", start = list(mean = 0, sd = 1))
:
        supplying pars for the Normal is not supported


What is the problem here ? Am I doing something wrong ?

Regards

EJ