plz help......Seqence recognizer error

`timescale 1ns/ 1ps

module tb_seqrec;

reg rnRESET, rCLK, rX;

wire wZ;

seqrec seqrec0(.nRESET(rnRESET), .CLK(rCLK), .X(rX), .Z(wZ));

always

begin

# 500 rCLK <= ~rCLK;

end

initial

begin

rnRESET <= 1'b0;

rX <= 1'b0;

19#100 rnRESET <= 1'bl;

20#1000 rX <= 1'bl;

21#1000 rX <= 1'bl;

22#1000 rX <= 1'b0;

23#1000 rX <= 1'b0;

24#1000 rX <= 1'bl;

25#1000 rX <= 1'bl;

26#1000 rX <= 1'b0;

27#1000 rX <= 1'bl; // Z=1

28#1000 rX <= 1'bl;

29#1000 rX <= 1'b0;

30#1000 rX <= 1'bl; // Z=1

31#1000 rX <= 1'b0;

32#1000 rX <= 1'bl;

end

endmodule

I made it. l thought there is no error.

but

:/Test/seqrec2/tb_seqrec.v(19): Expecting numeric digits.

** Error: C:/Test/seqrec2/tb_seqrec.v(19): near "1": syntax error, unexpected "IDENTIFIER", expecting ';'

** Error: C:/Test/seqrec2/tb_seqrec.v(20): Expecting numeric digits.

** Error: C:/Test/seqrec2/tb_seqrec.v(20): near "1": syntax error, unexpected "IDENTIFIER", expecting ';'

** Error: C:/Test/seqrec2/tb_seqrec.v(21): Expecting numeric digits.

** Error: C:/Test/seqrec2/tb_seqrec.v(21): near "1": syntax error, unexpected "IDENTIFIER", expecting ';'

** Error: C:/Test/seqrec2/tb_seqrec.v(24): Expecting numeric digits.

** Error: C:/Test/seqrec2/tb_seqrec.v(24): near "1": syntax error, unexpected "IDENTIFIER", expecting ';'

** Error: C:/Test/seqrec2/tb_seqrec.v(25): Expecting numeric digits.

** Error: C:/Test/seqrec2/tb_seqrec.v(25): near "1": syntax error, unexpected "IDENTIFIER", expecting ';'

** Error: C:/Test/seqrec2/tb_seqrec.v(27): Expecting numeric digits.

** Error: C:/Test/seqrec2/tb_seqrec.v(27): near "1": syntax error, unexpected "IDENTIFIER", expecting ';'

** Error: C:/Test/seqrec2/tb_seqrec.v(28): Expecting numeric digits.

** Error: C:/Test/seqrec2/tb_seqrec.v(28): near "1": syntax error, unexpected "IDENTIFIER", expecting ';'

** Error: C:/Test/seqrec2/tb_seqrec.v(30): Expecting numeric digits.

** Error: C:/Test/seqrec2/tb_seqrec.v(30): near "1": syntax error, unexpected "IDENTIFIER", expecting ';'

** Error: C:/Test/seqrec2/tb_seqrec.v(32): Expecting numeric digits.

** Error: C:/Test/seqrec2/tb_seqrec.v(32): near "1": syntax error, unexpected "IDENTIFIER", expecting ';'

what's wrong?