VMWARE Tools WARNING: Failed to get size of IP buffer / Failed to get nic info

Good morning,

i have a problem with a Windows 2008 R2 SP1 Server virtual machine on ESX 5.5 Enviroment.

Every about 30 days thisserver brings out the following warnings related to VMware Tools, in this sequence,
every 5 minutes for about 2 hours:

#1 Event 1000 – VMWARE Tools - [ warning] [vmsvc:guestinfo] Failed to get nic info.

#2 Event 1000 – VMWARE Tools - [ warning] [vmsvc:vmsvc] Failed to get size of IP buffer.

#3 Event 2001 – Perdisk – [warning] Unable to read performance data for the Disk performance counters.

...until it becomes inaccessible!!!

It responds to the ping in a discontinuos way (not good)

Vmware tools service doesn’t run

I cannot manage the server

I must force to RESET it from Vsphere to access again .

I already re-installed once the VMware Tools, but the problem persists.

Would you have some suggestions for me about this issue?

Thanks a lot.

Alex