The suggested connection on line6 to computer is wrong for Uno users. The connection should be
Uno <to midi out> = <out> DT50/25,
Uno <to midi in> = <input> DT50/25
I hope this helps in your hour of frustration.
yeah the cables are labled oddly in some of the uno's...
it will say TO midi in and TO midi out and it's easy to overlook the TO