Test runner license issue when running multiple tests simultaneously

Am running testRunner using bash scripts.

Want to run multiple tests to see how the system handles multiple users.

I run for i in {1..10};do echo $i;./RunTests_TestPack-TradeCloud-mmh-testpack16.sh -t massmart -e brytrain02 -r $i -l1 -f 4 >> /home/ds/loadTest.txt 2>&1 & done

Am getting the following, which stops the process.

*************************************************************************************
END USER LICENSE AGREEMENT
Since this is the first time you are running it after installing a new license,
you will need to accept the end user license agreement.
Please read it through carefully and review the conditions
*************************************************************************************

View license agreement now? [y/N]: 12:57:35,312 INFO [WsdlProject] Loaded project from [file:/home/ds/projects/IntegrationTestClient/trunk/onceOffTestScripts/../testCases/IMPONE-813-CreateOrder-SimpleValida
tion.xml]

I did see a previous post http://forum.soapui.org/viewtopic.php?f=2&t=25113, but I not sure if it relates.

Is it possible to work around this, or is it a licencing issue. 

I have a valid licence for soapui, and checked that the .key file is in  /home/ds/.soapui/. The license works fine on the front end, and if I run the script one at a time i.e. ./RunTests_TestPack-TradeCloud-mmh-testpack16.sh -t massmart -e brytrain02 -r $i -l1 -f 4

Regards,

Claus Zimmermann