Clover cannot see Linux

[klerg]

I have Yosemite 10.10.5 w/CLOVER on an SD card. OS X 10.10.5 and Windows boots from Clover, but Linux, it is Slackware 15, will not even pop up in Clover's menu. Yet Slackware does show in the UEFI F12 Boot screen and loads fine. Here is the config.plist, is any way to fix this ?

Thanks a lot