Unfortunately the Miners keep going down in the PIMP pool manager..Every 6-12h, what could be the problem..

I am using the 1.5.51 version with 14.6 AMD drivers..

My settings :

{
"pools" : [
    {
        "notes" : "PiMP Donations/Testing - X11 1",
        "url" : "stratum+tcp://eu.wafflepool.com:3331",
        "user" : "1KcMuYnTN99hMGCrvZnroi2Eof4i6Zdssd",
        "pass" : "x"
    },
    {
        "notes" : "PiMP Donations/Testing - X11 2",
        "url" : "stratum+tcp://useast.wafflepool.com:3331",
        "user" : "1KcMuYnTN99hMGCrvZnroi2Eof4i6Zdssd",
        "pass" : "x"
    }
]
,
"auto-fan" : true,
"intensity" : "17",
"vectors" : "1",
"worksize" : "256",
"lookup-gap" : "2",
"thread-concurrency" : "0",
"shaders" : "0",
"api-listen" : true,
"api-port" : "4028",
"api-allow" : "W:127.0.0.1",
"gpu-threads" : "2",
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"gpu-engine" : "0-0",
"gpu-memclock" : "0",
"gpu-powertune" : "20",
"gpu-vddc" : "0.00",
"gpu-fan" : "0-100",
"temp-hysteresis" : "3",
"temp-cutoff" : "95",
"temp-overheat" : "90",
"temp-target" : "80",
"log" : "5",
"no-pool-disable" : true,
"queue" : "1",
"expiry" : "20",
"scan-time" : "60",
"shares" : "0",
"kernel-path" : "/usr/local/bin",
"kernel" : "x11mod"
}