David,
Presuming it is the Anchor Point in the middle at 2 with both Handles shown, what you need to do is to (Smart Guides are your friends):
1) With the Direct Selection Tool ClickDrag the rightmost Handle to snap to the Anchor Point (Smart Guides say anchor when you are there), it is crucial to go all the way because just a wee bit missing/left may make a mess of the left Handle and prevent straightness;
2) Do the same for the left Handle at 3.
I would post an image set to show it, but GoLive refuses to start up.
You may show us what happens (not) when you (try to) do it.