issue on the latest update of ESX 3.5 has been resolved.
Heres the original messages:
The express patches are now available for download that will resolve the ESX/ESXi 3.5 Update 2 issue which causes the product license to expire as of August 12, 2008. Please go to http://www.vmware.com/go/esxexpresspatches for more information."
thank you Andrea, Dario and Mostafa for updating me soon ;)