[R] precision of std. error in summary

[Angelo Secchi]

Hi,
I'm doing robust regression with the following command

rlm(dip~ind1+ind2-1,method="M",psi=psi,maxit=1000,acc=1e-15)

now when I ask for a summary

summary(rlm(dip~ind1+ind2-1,method="M",psi=psi,maxit=1000,acc=1e-15))

I get

Coefficients:
     Value       Std. Error  t value    
ind1     -0.0377      0.0000 -24203.1415
ind2      1.0370      0.0000 668735.7195

taht is no std error

I've already tryied puuting a "digits = 6" with no success.
What is the proper way to ask R to provide more digits in the std error? 
Thanks


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 Angelo Secchi                     PGP Key ID:EA280337