DHCP Server unable to lease IP to Client.

I had configured the AD,DNS and DHCP server on Win Server 2008 R2 Enterprise SP1.But after one day My DHCP server unable to lease IP to Client  and give the below error.

Memory Leak. Application ("C:\Windows\system32\mmc.exe" "C:\Windows\system32\dhcpmgmt.msc" ) (PID: 1876) has passed a non-NULL pointer to RPC for an [out] parameter marked [allocate(all_nodes)]. [allocate(all_nodes)] parameters are always reallocated; if the original pointer contained the address of valid memory, that memory will be leaked. The call originated on the interface with UUID ({6bffd098-a112-3610-9833-46c3f874532d}), Method number (2). User Action: Contact your application vendor for an updated version of the application.

Please suggest.

Thanks,

Jayesh Salunkhe