Thread Subject: I would like to plot a line on a Scope Block in Simulink

I would like to plot a line on a Scope Block in Simulink. I have used a "From Workspace" block containing my two columns of time and speed data. I then run the simple model (consists of two blocks only - From Workspace and Scope), however, the line on the Scope only appears for the first 10 seconds of data when I actually want about 350 seconds of data on Scope. Any ideas?
Thanks.