MC-Server on Raspberry Pi

[jaru]

I did this:

sudo apt-get install subversion
mkdir MCServer
cd MCServer
svn checkout https://mc-server.googlecode.com/svn/trunk/
cd trunk
make release=1
cd MCServer
./MCServer

and I have all running, I configured to have the server on survival but something strange happens with the animals and mobs, they are not moving, they just keep jumping in the same place. Somebody has experienced this issue?

should I compile another version instead?

Thank you for your support, This is a great community, we are pioneers here