Computer cannot be discovered through Powershell command but can through GUI

Hello All,

I've got a strange issue.

I've deployed a server and am trying to add the server to my Management group by issueing the following command:

Install-SCOMAgent -name $OMAgent -PrimaryManagementServer $MS

This returns the following: Install-SCOMAgent : No computer could be discovered.

However, If I discover the server through the GUI then it gets discovered just fine..

How can I troubleshoot this?

Many thanks!

Filip