DHCP 2008 R2 - MMC Cannot Initialize Snap-in when clicking on Address Leases

I recently migrated my DHCP/DNS to a Windows 2008 R2 server. It generally seems to be working fine however, whenever I click on "Address Leases" within my scope it iterates all the leases and either at the end (or close to it) I just get the error "MMC cannot initalize the snap-in".

I have the Management tools installed on my XP machine, I when I view the DHCP then it all works fine so it just appears to be when I try to access it from within the server.

Anyone have any thoughts

---

jammyDP