I want to run cgminer for my ati 5850 and ati drivers 12.8 (i didnt installed any sdk), i try with this bat:

start /D "C:\cgminer" cgminer.exe -o http://api.bitcoin.cz:8332 -u XXXXXX.worker1 -p XXXXXXX -d 0 -I 9 -k diablo -v 2 -w 256

But it stop working, the alst time after 2 hours.

Phoenix 1.75 with Dia Kernel works for days.

Why i didnt installed any sdk?

Last time i try 2.5 sdks, i try to run cgminer with phatk, and cgminer said im running sdk 2.6 +, and phatk will not perform good.
Then i try more times doing clean installs, but it kepp saying that

Im running w7, using my oboard for my desktop (nvidia onboard graphics) and a second screen for ati, where runs phoenix its fine, but i want to run cgminer.