cgminer Stopped working win7

[gabi15555]

hi

i have 7970, 2x7870 and r9 270x on one MB. I´m using 2 runing cgminer separatelly for 7970 (-gpu-threads 2) and second for other devices (-gpu-threads 1)

i´m using amd driver 13.11

And i have a problem only with a second cgminer (first on 7970 work good), always every 2-3h program stopped working, sometimes only 5min and i need turn on this cgminer,

ty for help