Wireless access Local Only

I've a VAIO laptop running Vista Home Premium with a DLINK router. I've

searched threads here and elsewhere and found similar problems but no

definitive solution for my problem. The problem is I get seemingly random

occurrences of Local Only access. I say seemingly random but it seems to

occur after exiting sleep mode, after switching user or when going from

battery power to mains power but not every time. The signal strength remains

at normal strength hence no loss of siganl. The cure is sometimes to disable

and re-enable the PCs wireless adapter, sometimes re-boot the computer and

sometimes I have to power off the router. KIM (MS) replied to a similar

problem in March and said it was being worked on but the thread ended

soonafter. Any help would be appreciated. Thanks.