$readmemb task trouble

Hi Guys, I have a problem with $readmemb :( This is my code:

`timescale 1ns/100ps

`include "rom_sin_vec.txt"

module ROM_sin

(

input clk, rst,

input [10:0] addr,

output reg [11:0] data

);

reg [10:0] temp;

integer i;

reg [11:0] RAM_2048_12BIT [2047:0];

$readmemb ("rom_sin_vec.txt", RAM_2048_12BIT);

always @ (posedge clk or negedge rst)

begin

if (!rst)

data <= 12'b0;

else

if (clk)

begin

temp[10:0] = addr;

data = RAM_2048_12BIT[temp];

end

end

endmodule

And this is my txt file content

12'b000000000000

12'b000000000110

...

12'b111111111001

And when I compile my project, I got this error:

** Error: rom_sin_vec.txt(1): near "12": syntax error, unexpected "INTEGER NUMBER", expecting "class"

I'm using Modelsim-Altera Starter Edition, Version 6.5b

Who can tell me why this error occurs and how to fix it :( thank you so much