[galaxy-user] Unable to visualize the Tophat accepted hits by Trackster tool

Hello, My name is Pinkuan, and I have been analyzing some RNA-seq data these days, but I confronted a problem when I did the visualization of the Tophat recepted hits with the Trackster tool. When I add the data of Tophat recepted hits to the visualization tool, there turns out to be an error that I can not visualize the data. So, do you have any idea about how to solve this problem? Greatly thanks, Pinkuan