Vista - a problem i cant solve

So - i am having a network issue that i cant figure out---> "vista Home Premium x64"

When ever i lock my computer and am away from it for a while i loose my internet connection, then i have to restart to get it back.... i am running fios so i should have a constant connection....I use remote desktop to that machine and also i have IM clients running where family and friends from other states and time zones can leave me a message...
what i did -
When i view my internet connection there was a RED X between my router and the globe, so i knew i had a issue - the 2 fixes so far:
1) new network cable
2) control pannel --> NIC --> turned off the options that turns off connection to save power.

check out this MS KB, it addresses several issues, one of which is when the computer returns from hibernation it looses network info, specifically gateway info.
http://support.microsoft.com/kb/938979