parallel to serial

Hello All,I found this VHDL code on the web.library ieee;
use ieee.std_logic_1164.all;

entity piso is
    port(
         clk,load  : in std_logic;
         pi        : in std_logic_vector(35 downto 0);
         so        : out std_logic);
end piso;

architecture arch of piso is

    signal t   : std_logic;
    signal temp: std_logic_vector(35 downto 0);

begin

   process (clk,pi,load)
    begin
       if (load='1') then
             temp(35 downto 0) <= pi(35 downto 0);
       elsif (CLK'event and CLK='1') then
             t <= temp(35);
             temp(35 downto 1) <= temp(34 downto 0);
             temp(0) <= '0';
       end if;
    end process;

so <= t;

end arch;I create a test bench in ise and it appears to be okay.from myhdl import *
import argparse
W0 = 36
pp0 = Signal(intbv(0)[W0:])
ss0 = Signal(bool(0))
clk = Signal(bool(0))
ld = Signal(bool(0))
def cliparse():
    parser = argparse.ArgumentParser()
    parser.add_argument("--build", default=False, action='store_true')
    parser.add_argument("--test", default=False, action='store_true')
    parser.add_argument("--convert", default=False, action='store_true')
    args = parser.parse_args()
    return args 

def para2ser(clk, pp0, ss0, ld):
 
    t = Signal(bool(0))
    temp = Signal(intbv(0)[W0:])
    @always(clk.posedge)
    def logic():

        if (ld == 1):
          temp[36:0].next = pp0[36:0]
        else:
          t.next = int(temp[36:35])
           
          temp[36:1].next = temp[35:0]
          temp[1:].next = int(0)
        ss0.next = t
        
    return logic
  
def tb(clk, pp0, ss0, ld):
    instance_1 = para2ser(clk, pp0, ss0, ld)

    @always(delay(10))
    def clkgen():
        clk.next = not clk
    @instance
    def stimulus():
        
        pp0.next = 34359738368
        yield clk.posedge
        ld.next = 1
        yield clk.posedge
        ld.next = 0
        yield clk.posedge
        print ("%s %d") % (bin(pp0,36), ss0 )
        for i in range(36):
            yield clk.posedge
            print ("%d %s  %d") % (i, bin(pp0,36), ss0 )
        raise StopSimulation
    
    return instances()
def convert(args): 
    toVHDL(para2ser,clk, pp0, ss0, ld)
    toVerilog(para2ser,clk, pp0, ss0, ld)    
 
 
def main():
    args = cliparse()
    if args.test:
       tb_fsm = traceSignals(tb,clk, pp0, ss0, ld)
       sim = Simulation(tb_fsm)
       sim.run()  
    if args.convert:
        convert(args)

if __name__ == '__main__':
    main()   
Can someone tell me what I am doing wrong? I think it this line 
 temp[1:].next = int(0)I have tried without the int and I get the same results when I run python para2ser.py --test
Thanks 
Regards, Edward Vidal Jr. e-mail [email protected] 915-595-1613

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