st: Test fitness and Results explanation

[momo <mmsabra@gmail.com>]

Hi all,

I do a bivariate probit regression, and to test heteroscedasticity I used
linear regression and got the next results, so what do you think for the
procedure first and the second for the results, meanwhile the second test
with low chi2 and the first is high. And what about the significant p value

the work is on stata

Breusch-Pagan / Cook-Weisberg test for heteroskedasticity 
Ho: Constant variance
Variables: fitted values of nore

chi2(1) = 5897.97
Prob > chi2 = 0.0000


Breusch-Pagan / Cook-Weisberg test for heteroskedasticity 
Ho: Constant variance
Variables: fitted values of expo

chi2(1) = 6.54
Prob > chi2 = 0.0106

thanks in advanced
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