AttributeError: 'numpy.ndarray' object has no attribute 'values' using PANDAS

Hi I am trying to use the bootstrap_plot() function on a data sample, but run into the following error. I have used the same data arrays to plot histograms using matplotlibs hist() function with no problem.

Traceback (most recent call last):
 File "/home/Astrophysics/BootStrapping.py", line 19, in <module>
    bootstrap_plot(C, size=17517, samples=1000, color='grey')
  File "/usr/local/lib/python2.7/dist-packages/pandas-0.8.2.dev_eec8a83-py2.7- linux-    i686.egg/pandas/tools/plotting.py", line 301, in bootstrap_plot
    data = series.values
AttributeError: 'numpy.ndarray' object has no attribute 'values'

My Code

import matplotlib.pyplot as plt
import numpy as np
import scipy
import matplotlib.mlab as mlab
import statsmodels.api as sm
import pyfits
from pandas.tools.plotting import bootstrap_plot

F = '/home/khary/Astrophysics/outfiles/outmag20_2dr_9_658.txt'
#data_cube ,header_data_cube = pyfits.getdata("/home/Astrophysics/SDSS_Counts    /count.dr72bright0.3dlz01r01c06.0.fits",1,header=True)


#load arrays with data 
data=np.loadtxt(F)
C=data[:,3]
#obs_count = data_cube.field(3)

#Bootstrap plot
bootstrap_plot(C, size=17517, samples=1000, color='grey')
plt.show()