2 PCs not visible in net view or network browsing - Why?

I have w2k domain with 10 workstations, 2 of them are not wisible no mather what i do.

All are configured per DHCP..

these two machines are w2k and winxp, they both see each other in net view but no other machines from domain.

what should i do?

please tra to help.

tenx! 

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