Using Kubuntu Karmic / Kdenlive 0.7.9

Working with two 1-hr avi files.

Edit file one and put on timeline; edit file 2 and put on timeline.

Cannot scroll to the end of the timeline with both file joined.

No matter what I try to enable/do, I can only see 01:06:40:00 of the project

Please advise as to my problem.