Win 7 "Server" Service stops after awhile

[FrozenDevl]

So I'm using my main PC as a server for all my multimedia as well. After a awhile (12 hours-24 hours of streaming across network/downloading) it will hit a wall and shut down my network adapter. From that point I get no connectivity unless I restart the Server service. Before SP1 I had this fixed by applying these two regedits.

Set the following registry key to ’1′:

HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management\LargeSystemCache

and set the following registry key to ’3′:

HKLM\SYSTEM\CurrentControlSet\Services\LanmanServer\Parameters\Size

And it worked great until I installed Service Pack 1. Ever since then it has been shutting down randomly after so much data. The same values are still there. I have tried switching them out and back in with a restart to see if that would fix it, but no go. I'm not sure what else could be causing this.