Second Life Time Sync Issue

I'm running Windows Vista, and I'm connected to an internet based time synchronization. The time on my computer is 100% accurate, however, Second Life time fluctuates between 7-10 minutes ahead of what the time should be.

Whenever I alter the time on my computer, it also alters SLT and causes it to always be approximately 7-10 minutes ahead. Despite everything I have tried so far, I haven't been able to find a way to have both times be accurate. If SL is fluctuating only when I change my computer's time, that would mean it is syncing from my computer; so why isn't it identical time?

Example: Right now, my clock says 7:53 EST, and SL time is stating as 5:03 SLT, 10 minutes off. If I change my computer time to 7:30 EST, SL goes to 4:40. The minutes never match.

Does anyone know what is causing this alteration in time to fluctuate? Any help or suggestions would be greatly appreciated.

that is strange cause mine is identical. maybe someone else can shed some light on the issue