Cant claim 50 extra cubits

When you first register to chesscube, you get some sort of todo-list at the top of your screen. I fullfilled all of them, but do not get the last 50 extra cubits for fullfilling all the others. Tried to claim it with different browsers and on different computers, but to no avail.
Who can help me?

It is not necessary to try all successively

[email protected]#* forever!

Strange I've just logged in, played and won 2 games, my rating changes but I dont get the cubits , perhaps its a bug in the system? .....