Sometimes when I need to search through cluster arrays with some element values excluded, I do like this 
 
 
Download File:post-5958-1206627103.vi 
1. Turn cluster array into a boolean cluster array by checking equality 
2. Filter the active element by performing an AND operation 
3. Search for the desired boolean cluster pattern 
In this case the resulting index is 4, since the first element wasn't activated. 
Hope this helps. 
/J