Will Soap UI no pro version and pro verison work together on a single box when ?

I have both SOAP ui non pro version and the pro version with trail license.

I get NoClassDefFoundError while invoking testrunner.bat from cmd line while using no pro version and I get System could not find the path specified while using pro version.

Could this be caused by both existing together?

my invoking statement from ant script is

${SOAPUI_PATH}\testrunner.bat -e ${WS_URL}/LotDTOService -r -f D:\INCA_AUTO -c "MES_Lot_TestCase" D:\INCA_AUTO\INCA_SVR8_Proj-soapui-project#trial.xml

SOAPUI_PATH is set to the bin directory of soap ui
WS_URL is the WSDL URL