help with a workflow triggering a field update

Hi,

 

I'm trying to create a workflow that updates a value in a field whenever any update (or combination of updates) is done to 15 fields on the contact record. Here is the workflow I had written but it doesn't fire off the way I expect it to.

(([<IndexedPick5>] = 'USA CAPITAL ADVISORY GROUP' AND [<ContactType>] LIKE 'Broker') OR ([<IndexedPick5>] = 'USA FINANCIAL INSTITUTIONS GRP' AND [<ContactType>] LIKE 'Broker') OR ([<IndexedPick5>] = 'USA NATIONAL ACCOUNTS' AND [<ContactType>] LIKE 'Broker')) AND ((PRE('<IndexedShortText0>') <> [<IndexedShortText0>]) OR (PRE('<IndexedShortText1>')<>[<IndexedShortText1>]) OR (PRE('<IndexedLongText0>')<>[<IndexedLongTe