Soapui-eclipse plug in gives error

Hi,

I have taken soapui-eclipse plugin  from this link https://sourceforge.net/projects/soapui/files/soapui-eclipse-plugin/4.0.1/

I unzipped and copied the files to the eclipse/dropin directory.

Restarted the eclipse.

Go to eclipse->perspective and i can see soapui in the list. But when i click on soapui eclipse crashes and returns error like:

log4j:ERROR setFile(null,false) call failed.
java.io.FileNotFoundException: soapui.log (Permission denied)

WARN [SoapUI] Missing folder [/home/usr/ext] for external libraries
INFO [DefaultSoapUICore] initialized soapui-settings from [/home/usr/soapui-settings.xml].

Do i need any external libraries in order for this to work? If yes, can any one direct me what libraries i need to add and where to add them?

Many thanks for your help,