Hello, i ve a problem with plot_date and need help thx

Hi, i try to use the plot_date function and i have some problems, is anybody can help me

My program :

First to show it's ok to run if i just used the only plot function

from pylab import *
import marshal
import time
import string

lst_date=[]
points=[]
belos=[['2', '2', '2', '2', '2', '2', '2', '54', '125', '169', '224', '245', '245', '245', '325', '325', '325', '453', '486', '521', '521', '521', '8596', '9566', '9848', '10064'], [1148378715.6400001, 1148379045.312, 1148379057.7179999, 1148379069.375, 1148379331.921, 1148390222.3280001, 1148390265.2650001, 1148396382.562, 1148464116.609, 1148481671.6559999, 1148534908.2520001, 1148551483.8299999, 1148573370.8770001, 1148589279.517, 1148625453.8429999, 1148640384.5150001, 1148659451.25, 1148709552.921, 1148740419.375, 1148799935.5780001, 1148827804.0, 1148886086.109, 1148915795.984, 1148972914.8429999, 1149001049.671, 1149053926.7650001], ['2:349:7', '2:349:7', '2:349:7', '2:349:7', '2:349:7', '2:349:7', '2:349:7', '3:56:5', '3:56:5', '3:56:5', '3:56:5']]

point=belos[0]
dt_date=belos[1]

for j in dt_date:
    date=time.ctime(j)
    lst_date.append(date)

print lst_date

for i in point:
    a=int(i)
    points.append(a)
    print belos
print point
print len(point)
print len(lst_date)
#plot (date, point, 'ro')
#show()

#plot_date(dt_date, points, '', xdate=True, ydate=False)
plot(dt_date, points, '',)
#savefig('secondfig.png')
show()

The i try with the plot_date function and i got on error:

Traceback (most recent call last):
  File "C:\Python24\uni_22\belos_stat.py", line 32, in -toplevel-
    plot_date(dt_date, points, '', xdate=True, ydate=False)
  File "C:\Python24\Lib\site-packages\matplotlib\pylab.py", line 2039, in plot_date
    ret = gca().plot_date(*args, **kwargs)
  File "C:\Python24\Lib\site-packages\matplotlib\axes.py", line 2830, in plot_date
    self.autoscale_view()
  File "C:\Python24\Lib\site-packages\matplotlib\axes.py", line 815, in autoscale_view
    self.set_xlim(locator.autoscale())
  File "C:\Python24\Lib\site-packages\matplotlib\dates.py", line 537, in autoscale
    dmin, dmax = self.datalim_to_dt()
  File "C:\Python24\Lib\site-packages\matplotlib\dates.py", line 403, in datalim_to_dt
    return num2date(dmin, self.tz), num2date(dmax, self.tz)
  File "C:\Python24\Lib\site-packages\matplotlib\dates.py", line 205, in num2date
    if not iterable(x): return _from_ordinalf(x, tz)
  File "C:\Python24\Lib\site-packages\matplotlib\dates.py", line 154, in _from_ordinalf
    dt = datetime.datetime.fromordinal(ix)
ValueError: year is out of range

i want the x axis show me the date on this format : Tue May 23 12:05:15 2006', 'Tue May 23 12:10:45 2006', 'Tue May 23 12:10:57 2006 etc...

Thx for answer