WebMethods Developer on Linux

Good Evening,
I am new to this user group and this is my first post. I want to install webMethods Developer 4.6 on Linux. Whenever I try using webMethods Installer, it gives NullPointerException before displaying the list of available downloads. If someone has tried something similar, please suggest me.

Hope this user group makes a great place to come around for me and all.
“Be Good, Do Good”.