GPU folding stoppped need help

[AndyD]

Hi all, not sought help for a while as my rig has been stable. Folding 100% on CPU is OK, but folding on my GPU 8800GTX has stopped working. I am using gpu windows client version 6.41r2. Tried to install latest GPU3 but said access denied to site! The error message I am getting is as follows. Here's a copy and paste from my log file.

Passkey found
[00:56:07] Gpu type=2 species=10.
[00:56:07] - Connecting to assignment server
[00:56:08] + No appropriate work server was available; will try again in a bit.
[00:56:08] + Couldn't get work instructions.
[00:56:08] - Attempt #8 to get work failed, and no other work to do.
Waiting before retry.

I set this rig up about 10 months ago and not really tweaked it much, so please keep advice simple with step by step what to do if possible. Sorry to be a pain but lots of details about different clients and the specific ways to set them up with command lines can be confusing to a relative beginner like me
cheers for the help

[Tattysnuc]

My GTX 295 seems to no be playing ball any more either...

# Windows GPU Console Edition #################################################
###############################################################################

                       Folding@Home Client Version 6.23

                          http://folding.stanford.edu

###############################################################################
###############################################################################

Launch directory: C:\Users\Mike\AppData\Roaming\Folding@home-gpu1
Arguments: -gpu 1 -forcegpu nvidia_g80 -forcegpu nvidia_g80 

[12:05:53] - Ask before connecting: No
[12:05:53] - User name: Tattysnuc (Team 35947)
[12:05:53] - User ID: 1DF4827C6FEDCA07
[12:05:53] - Machine ID: 3
[12:05:53] 
[12:05:53] Loaded queue successfully.
[12:05:53] Initialization complete
[12:05:54] - Preparing to get new work unit...
[12:05:54] + Attempting to get work packet
[12:05:54] - Connecting to assignment server
[12:05:55] + No appropriate work server was available; will try again in a bit.
[12:05:55] + Couldn't get work instructions.
[12:05:55] - Attempt #1  to get work failed, and no other work to do.
Waiting before retry.

[houch]

mines stopped aswell, weird

[Christopher N. Lew]

If your rigs stop getting WUs, then CHECK THE STANFORD SERVERS!