If you are playing on your own server, you can figure out that issue fairly easily. It could be a typo in the task with a wrong ID, but it could also just be that there are multiple item IDs for the item with that same name. Like in cases of Bone Chips, where there might be 10 different versions of the same item, but only 1 item id might work in a particular task. You could check your task tables and check which item ID is there. If there are multiple of the same item with different IDs, you can always set a goal list for that step and include all item IDs you would want to update the task. Otherwise, if it is just the wrong id, you can correct that easy enough.
If you do find that there is an issue and correct it, you can submit your fix in quest submissions or post about it on the PEQ forums for them to resolve it there (they would be doing it either way).
Doing a search on 13th floor where PEQ gets their items from, it only shows 1 result for that item name and it matches the item you got (13262).
http://eqitems.13th-floor.org/item.php?id=13262
So, most likely, the task just needs to have that one field updated to the correct item id.