If those passes are from before 2005, then the pluses on them are still good for waterpark or PI admission. Park Hopper Plus passes (as they were formerly called) had no expiration automatically included. But the "pluses" were not valid for DQ aadmission.
If the passes are MYW passes from 2005 and it's been 14 or more days since you first used them, you're out of luck unless you purchased the no-expiration option.
edited to add: If the passes were Length of Stay (also called Unlimited Magic) passes from pre-2005, they expired at midnight of the day your stay at WDW ended.