Can't dimension Sketch to datum plane

[Buckshott00]

Hello,

I am running NX7.5.4.4 on Windows XP Pro 32bit.

One of my settings is off. When Sketching I am unable to dimension to a plane. When I save a part on our network if another engineer opens the the sketch they are able to dimension to the plane, but I am unable to.

I have looked at the selection filters but I turned them off and still have the problem

 

[Buckshott00]

yeah it caught me off guard too, I should have known better given the original author of the part file and his predisposition towards things pre-NX4. It makes perfect sense in hind-sight why deleting the center-line allow for normal dimensioning