In Eclipse, I'm trying to set a breakpoint, but only getting a 'set bookmark name' popup

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Hi Not sure if this is due to mixing Eclipse with ROS, but while trying to set a breakpoint by double clicking in the left border of the editor on a line in my C++ code I keep getting a popup menu for setting a bookmark name. Right mouse clicking in the left border displays a menu to add a bookmark or a task. This occurs both in the C/C++ and Debug perspectives.

I am able to run the program in Eclipse to completion, I would just like to get use to using the debugging facilities before moving on to more complicated stuff.

I have Eclipse v 4.4.1, running on Ubuntu 12.04. and it is setup (through the use of catkin) to develop ROS (hydro) apps as described at http://wiki.ros.org/IDEs#Eclipse

Any suggestions would be appreciated, thanks...