Errors in testing the SciPy installation

[Markos]

Hi,

Following the guidelines of the book Learning SciPy for Numerical and 
Scientific Computing Second Edition

I did the tests:

 >>> import scipy
 >>> scipy.test()

and got some errors:

Ran 23065 tests in 490.568s

FAILED (KNOWNFAIL=60, SKIP=1795, errors=29)
<nose.result.TextTestResult run=23065 errors=29 failures=0>

What should I do?

Thank you,
Markos