Hello Amir,
I believe the first warning "Unable to locate...." is harmless. It indicates that the version of Java installed on your machine is a JRE, rather than the expected JDK.
To resolve the second error, you will need to remove the following line in the build.xml: <jvmarg value="-server"/>
(in the "run.driver" target)
Can you please try this and let us know if this works?
Thanks for your time,
-Laurent