Do you have WebSphere 6.1 SP5 installed?
What version do you get when you execute the command %JAVA_HOME%\bin\java -version?
This is coming from the installation document:
Installing WebSphere Application Server
You must install WebSphere Application Server 6.1 for running LiveCycle ES products.
When you run the LiveCycle ES installer, you should run it as the same user.
Installing a Fix Pack to WebSphere 6.1
After you have installed WebSphere 6.1, you must update to Fix Pack 5 or later before you deploy LiveCycle ES.
Refer to the WebSphere support website for access to the WebSphere updates.
Setting the JAVA_HOME and PATH environment variables
As part of your WebSphere installation, a Java SDK was installed. The JAVA_HOME and PATH environment
variables must point to the Java SDK where LiveCycle ES is to be deployed.
➤ To set the JAVA_HOME environment variable (Windows):
1. Select Start > Control Panel > System.
2. Click the Advanced tab.
3. Click Environment Variables.
4. In the System Variables area, click New.
5. Enter JAVA_HOME as the variable name and enter the directory where you installed Java SDK. This directory is where WebSphere installed the Java SDK containing the /bin sub directory.
For example,type the following:
Note: To verify your JAVA_HOME environment variable, open a command prompt and run the following
command: %JAVA_HOME%\bin\java -version
You should receive a response that begins with java version "1.5.0".