Resolve Linux 17.2.1 B 12 ALT+Left click Clone not working-

HI,
I'm running Davinci Studio 17.2.1 on Fedora 23 64 bit. I am in Fusion tab trying to use the Paint tool clone function. Unfortunately, this does not work. ALT+Left click selects the location and the tool is set to Stroke and Clone but it is not drawing anything. Sometimes the marker moves with the paint tool but sometimes it doesn't. I have watched several Video tutorials and i know i am doing it right. The node setup is simple. Source ->Paint->Output, no fancy connections.
thank you,
JD
I'm running Davinci Studio 17.2.1 on Fedora 23 64 bit. I am in Fusion tab trying to use the Paint tool clone function. Unfortunately, this does not work. ALT+Left click selects the location and the tool is set to Stroke and Clone but it is not drawing anything. Sometimes the marker moves with the paint tool but sometimes it doesn't. I have watched several Video tutorials and i know i am doing it right. The node setup is simple. Source ->Paint->Output, no fancy connections.
thank you,
JD