[R] epi.2by2

[pcc]

This is a really simple question, I'm sure,but I can't make EpiR work! 
I keep getting the following: 

> epi.2by2(47, 263483, 282, 935028, method="cohort.time", conf.level=0.95)
Error in epi.2by2(47, 263483, 282, 935028, method = "cohort.time",
conf.level = 0.95) : 
  unused argument(s) (935028)

and I really don't know why!. Any ideas very very welcome
thank you

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