how to add a spice netlist component and how to simulate it

i tried adding the following spice code using this link

http://community.cadence.com/cadence_blogs_8/b/rf/archive/2009/01/07/tip-of-the-week-how-to-simulate-a-subcircuit-netlist-with-spectre-in-ade

simulator lang=spice

.SUBCKT memristor Pside Nside PARAMS:

+ Ron=1K Roff=100K Rinit=80K D=10N uv=10F p=1
***********************************************
* DIFFERENTIAL EQUATION MODELING *
***********************************************
Gx 0 x value={ I(Emem)*uv*Ron/D^2*f(V(x),p)}
Cx x 0 1 IC={(Roff-Rinit)/(Roff-Ron)}
Raux x 0 1T

* RESISTIVE PORT OF THE MEMRISTOR *
*******************************
Emem plus aux value={-I(Emem)*V(x)*(Roff-Ron)}
Roff aux minus {Roff}
***********************************************
*Flux computation*
***********************************************
Eflux flux 0 value={SDT(V(plus,minus))}
***********************************************
*Charge computation*
***********************************************
Echarge charge 0 value={SDT(I(Emem))}
***********************************************
* WINDOW FUNCTIONS
* FOR NONLINEAR DRIFT MODELING *
***********************************************
*window function, according to Joglekar
.func f(x,p)={1-(2*x-1)^(2*p)}
*proposed window function
;.func f(x,i,p)={1-(x-stp(-i))^(2*p)}
.ENDS memristor

i get these errors

Error found by spectre in `memristor', during circuit read-in.
    ERROR (SFE-1024): "/home/eashwar/Desktop/model" 23: Instance `Cx': Unexpected value `/' - positional parameters are not allowed after explicitly named parameters.
    ERROR (SFE-1024): "/home/eashwar/Desktop/model" 23: Instance `Cx': Unexpected value `Roff-Ron' - positional parameters are not allowed after explicitly named parameters.
Warning from spectre in `memristor', during circuit read-in.
    WARNING (SFE-1805): "/home/eashwar/Desktop/model" 43: .func is not recognised as a valid SPICE control card.

how to use this code to create a component ,..,so that we can use this model for further simulations

please suggest steps