If you are upgrading from ES1 to ES2, you may want to do the following,if you have login problems.Option A 1) Enable Force Mac option in ES2. Leave it blank or enter "00-00-00-00-00-00". If that doesnt work, then try the following OPTION B a) Goto command prompt using "cmd" in run dialog. B) type "ipconfig /all" c) Copy the physical address parameter. d) Enable force mac in ES2. e) Insert the copied physicaal address parameter in the mac option text box.