Could not connect to host localhost on port 21212

Hi,

I just installed SAP NetWeaver Application Server ABAP 7.03 64-bit Trial on my Windows 8 PC. The installation seems to have been successful. When I try to run the sapinstgui.exe I get the following error:

Error while connecting to communication partner - see preceeding messages.

Could not connect to host localhost on port 21212.

java.net.ConnectException: Connection refused: connect

java.net.ConnectException: Connection refused: connect

I already have JAVA_HOME set. There is no process running on port 21212. My Java version is 1.6.0.43.

What could be causing this issue ?

Thank you in advance.