Android Studio 0.2.5 Does not see Galaxy S4 as device

Android Studio 0.2.5 Does not see Galaxy S4 as device

I've googled all over the place and have yet to find an answer. I have a
new Galaxy S4 and just downloaded Android Studio. I'm trying to run my
first Hello World app on my phone, yet Android Studio 0.2.5 does not see
the device. I have enabled Dev mode on my S4 as I've read, but still no
go. I even tried restarting my S4.
Anyone have any sort of idea what might be the issue?