Ivan,
As Andreas noted, the Hello-World output is as expected from the E64 board. As for the matmul - if you are running the latest eSDk (5.13.07.10), then this example uses a feature of the chip that was not supported in the previous firmware revisions. Please follow the instructions in the UPDATE 2 of the release announcement:
viewtopic.php?f=13&t=422&p=2614#p2623
Please make sure that you backup the old bitstream before updating to the new! If the new one does not work on your board, it is the shortest path to restoring the current state.