Actually that line would never run, as it goes back to loop.
Also, you need the parameters of cudaminer in every line, not at the bottom.
:loop
cudaminer.exe -R 5 -r 5 -o stratum+tcp://minercrew.org:3336 -u miner.user -p password -d 0,1,2 -i 1,0,0 -l auto,S27x3,28x4 -C 0,2,1
cudaminer.exe -R 5 -r 5 -o stratum+tcp://pool.yourmine.org:3340 -u miner.user -p password -d 0,1,2 -i 1,0,0 -l auto,S27x3,28x4 -C 0,2,1
cudaminer.exe -R 15 -r 2 -o stratum+tcp://zeit.hashstrike.com:3341 -u miner.user -p password -d 0,1,2 -i 1,0,0 -l auto,S27x3,28x4 -C 0,2,1
cudaminer.exe -R 5 -r 2 -o stratum+tcp://zeit.morecoins.org:3334 -u miner.user -p password -d 0,1,2 -i 1,0,0 -l auto,S27x3,28x4 -C 0,2,1
cudaminer.exe -R 5 -r 2 -o stratum+tcp://east1.us.stratum.dedicatedpool.com:3366 -u miner.user -p password -d 0,1,2 -i 1,0,0 -l auto,S27x3,28x4 -C 0,2,1
cudaminer.exe -R 5 -r 2 -o stratum+tcp://zeit.coins4everyone.com:3453 -u miner.user -p password -d 0,1,2 -i 1,0,0 -l auto,S27x3,28x4 -C 0,2,1
cudaminer.exe -R 5 -r 2 -o stratum+tcp://zeit.hashfever.com:3265 -u miner.user -p password -d 0,1,2 -i 1,0,0 -l auto,S27x3,28x4 -C 0,2,1
goto loop
its giving me a "non existant cuda device specified in -d option.
this is an example of what works for me with vert when i dont want or need to switch pools
cudaminer.exe -o stratum+tcp://vtc.poolz.net:3333 -u miner.user -p password
cudaminer.exe -d 0,1,2 -i 1,0,0 -l auto,S27x3,28x4 -C 0,2,1
that runs for me stable 24/7.
I appreciate the help, but i gotta go for now.
Okay...
Where did you manage to find the configs, because clearly your understanding of how it works is lacking. (No offence)
Perhaps give the output of your "running" version (right-click -> mark -> select the text -> press enter -> paste it here)