Viewing Memory in Modelsim. Objects not appearing

Hi Guys

I am new to Modelsim and I have hit a problem, I want to view the contents of a register but its not appearing on my objects list or memories
what seems strange to me is the fact that another register declared in my code does. Here is my code. ram appears but none of the others do. Any ideas.

Thanks a bundle

Sam

module Digitalfilter3(clk,Y,X);

input clk;
output[7:0] Y, X;
reg[7:0] X,X1,X2,Y,Y1,Y2;
reg signed [32:0] ram[0:'d4095], rom[0:'d4095];
//reg signed [32:0]
reg [13:0] i;

initial
begin
$readmemh("H:/Digitalfilter3/data1.txt", ram);
i=0;
Y = 0;
Y1 = 0;
Y2 = 0;
X = 0;
X1 = 0;
X2 = 0;
//y[0]= 0-ram[0];
//y[1]= 0-ram[1];
//i=2;
//out=0;

// $dumpvars(0, Digitalfiltering2);
end

//always@(posedge clk)
//begin
//i=i+1;
//end


always@(posedge clk)
begin
if (i<4095)
begin
X2 = X1;
X1 = X;
X = ram;

Y2=Y1;
Y1=Y;

Y = X2 - X - (Y2/4);
rom=Y;
i=i+1;
end
end

endmodule

// y = x(n-2) &#150; x &#150; 0.25 * y(n-2).

add the switch -voptargs=+acc=npr to the vsim command that you use to launch the simulation.

Optimization by default turns off visibility of everything but the ports of a design and I guess your ram.

Thanks so much that worked.