Button Disabled?

Hi everybody,  I want to customize button activation in Dataview1 over association to Datagrid 2 but I got 2 problems to be solved: 1st: When I click on the row in datagrid, I can unclick the row. So the button nav always on “able”.  2nd: For Example: Start Button > Paused Button > End Button Before I click Start Button, Paused Button and End Button will be disabled. After click Start Button, Paused and End will be able and Start will be “disabled” and so on. Any suggestions? Thanks alot P/s: English is not my mother tongue so I hope you guys can understand
1 answers

Here is my image. I dont know how to explain it right now. It kind of new things for me