Navigation bar question

[Rob]

What determines if a step in the navigation bar is grayed out or not? 

Mine is behaving oddly. Each step has the option for the user to create a new usercontrols (each containing several controls) via button click. But, when I do that the postback grays out all the segments in the navigation bar after the page reloads.

Thanks in advance for any information anyone can provide.

[Rob]

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