Question: No Plot Shows up using DEPlot

I am trying to generate a plot for DEplot(LVS, [x(t), y(t)], t = -10 .. 10, x = -5 .. 5, y = -5 .. 5, [x(0) = 1, y(0) = 1], stepsize = 0.1, linecolor = blue, thickness = 2, arrows = medium, title = "LVS") but no plot shows up.  What am I doing wrong.

Please Wait...