Soap Ui 5.4.0 for Linux Mint 17.1 cinnamon 32 bit

Hi Guys, I am using Linux mint 17.1 cinnamon 32 bit O.S. I am facing issues when i try to install soap ui open source on my system. Can some one guide me the right approach. including below the steps followed.

1. Downloaded from -- https://www.soapui.org/downloads/latest-release.html/Linux installer 32 bit.

2. Downloaded as SoapUI-x32-5.4.0.sh

3. Extracted it through chmod +x SoapUI-x32-5.4.0.sh

4. Executed ./SoapUI-x32-5.4.0.sh boom and i am getting below mwntioned error.

gzip: sfx_archive.tar.gz: not in gzip format

I am sorry, but the installer file seems to be corrupted.
If you downloaded that file please try it again. If you
transfer that file with ftp please make sure that you are
using binary mode.