Pick up penyas drop - Inventory is full

Hello ,

I started a server with v15 sources (spiken), but when i kill a monster (every monster), and i try to take penyas, it says 'Inventory is full', or it take the item 'Penya', and nothing append in my iventory..

I can take items w/o problems...

If anyone know what's the problem, it's really annoying :(

Thanks, Mondyo.