Access denied when remotely trying with Get-NlbClusterNode

When I locally, on the SMTP Cluster run this command:

Get-NlbClusterNode 

I get the output I need.

But if I try the same from a remote server (same network and domain) I get an:

[smtp-s001a]: PS C:\>Get-NlbClusterNode Accessis denied.(Exceptionfrom HRESULT:0x80070005(E_ACCESSDENIED)) +CategoryInfo         : +FullyQualifiedErrorId: AccessDenied,Microsoft.NetworkLoadBalancingClusters.PowerShell.GetNlbClusterNode 

Why is that? It is ONLY the "Get-NlbClusterNODE" command that gives me access is denied. "Get-NlbCluster" for an example, works just fine.

 I am connecting as a Domain Administrator (which is a member of the Local Administrators Group on every node). Same account used remotely when I log on locally, where it works locally.

Any advice?

Thanks Horst MOSS 2007 Farm; MOSS 2010 Farm; TFS 2010; IIS 7.5