Failed to install SOAPUI

Thank you for helping me.
I have created a JAVA_HOME environment that include jre
In program File | Java, the folder structure like below:
- Program File
- Java
- jre7
In SOAPUI4.5.1 zip and extract to the following folder structure
- soapui-4.5.1
- bin
- actions
- ext (I put all my custom jar files here)
- listeners
- lib
- licenses
- Tutorials
- wsi-test-tools

I check the soapui.bat which i used to lauch the SOAPUI. In soapui.bat, it has the following to embed jre

set JAVA=%JAVA_HOME%\bin\java

set CLASSPATH=%SOAPUI_HOME%soapui-4.5.1.jar;%SOAPUI_HOME%..\lib\*;

Notes that the JAVA_HOME environment points to c:\Program Files\Java\jre7\bin\java

When I launch the SOAPUI, in the window console displays the folowing:
java.lang.UnsatisfiedLinkError: Cannot load native JNIWrapper library (jniwrap.dll)

In SOAP window, if i click on the TestCase, the TestCase editor cannot open, in the window console, it displays the following:
An error occured [Could not initialise class com.jniwrapper.win32.com.types.clsid], see error log for details. I

I dont know where to find the error log.

This is a main problme - cannot open the TestCase Editor..
please advise. thanks