Use of .Fortran

Well, it is not Fortran 77 but Fortran 95, and so needs to be given a 
.f95 extension to be sure to work.

file SSFcoef.f
     subroutine SSFcoef(nmax,nu,A,nrowA,ncolA)
     implicit double precision(a-h,o-z)
     implicit integer (i-n)
     integer l,i,nmax
     double precision nu,A(0:nmax,0:nmax)
     A(0,0) = 1D0
     do l=1,nmax
      do i=1,l-1
        A(l,i) = (-nu+i+l-1D0)*A(l-1,i)+A(l-1,i-1)
      end do
      A(l,0) = (-nu+l-1D0)*A(l-1,0)
      A(l,l) = 1D0
     end do
     return
     end
I created a dll (this is windows) using R CMD SHLIB SSFcoef.f
Then my R code is:

 ### Load the compiled shared library in.
 dyn.load("SSFcoef.dll")

 ### Write a function that calls the Fortran subroutine
 SSFcoef <- function(nmax, nu){
  .Fortran("SSFcoef",
           as.integer(nmax),
           as.integer(nu)
           )$A
 }

 SSFcoef(10,2)

which when run gives

SSFcoef(10,2)

 NULL

I am pretty sure the problem is that I am not dealing with the matrix A
properly. I also tried this on linux and got a segfault.

Can anyone supply the appropriate modification to my call (and possibly to
the subroutine) to make this work?