No roots exist on machine

Hi,

I have 2 file servers. FS01 & FS02

They are configured DFS \\contoso.com\FS

When I try Get-DfsnRoot -ComputerName FS01, no reply but FS02 reply with Path, Type, Properties, TimetoLiveSec & State

So I try with "dfsutil server FS02" and FS02 reply with

Roots on machine FS02

\contoso.com\FS

Done with Roots on machine FS02

But FS01 reply with

No roots exist on machine FS01

Any idea?