Am now, still won't wor k.
OK, let's take this one step at a time to see where the problem lies. I know it does work OK on Win7 64bit + Chrome, because I've tested it with that combination on both my home and work PCs, so it's not a general incompatibility issue...
Step 1 is done, we're on the secure server.
Step 2 - are you logged-in?
Step 3 - do you see the "Show URs/map problems" checkbox sandwiched between the Search Address | Get Directions bar and the map display area?
Step 4 - is the box ticked?
Step 5 - do you see a pale greeny-yellow rectangle overlaid on the centre of the livemap?