Troubleshooting
The arrowhead is drawn in the wrong place. You are probably using a link line with a breakpoint, and the breakpoint is located under the concept box. To solve this problem, double click on the link line and move the break point out of the destination concept box. Then click "Save Breakpoints" in the BreakPointSetter window.
Concepts can not be selected. LifeMap is probably in Browse mode. Choose "Concept Selector Tool" under the Edit Menu (or Command-J).