If you are experiencing a Java error when trying to install CallerIP then the most likely problem
is that the correct Java is not installed or if it is installed, CallerIP is not using it for some reason.
Visualware products are designed using Sun's JVM and therefore we recommend downloading and installing
Sun's JVM from their web site, the latest being 5.0
http://java.sun.com/j2se/1.5.0/download.jsp.
Once you have downloaded and installed the JVM try installing/running CallerIP again.
If you continue to have problems the it is probably that CallerIP is for some reason not using the newly installed JVM.
Below is a step by step guide which should help solve the problem:
Step 1: Click on the Start Bar (Windows) and go to the 'Search' option, then click on 'For Files or Folders...' as shown below:

Step 2: This will launch a new dialog box with some options on the left hand side of the window. You need to click the 'All Files and Folders' option as shown below in red:
Step 3: In the text box 'All or part of the file name' type 'view'. Then click on the drop down menu called 'Look in' and go to 'Browse'. Now you will get a tree diagram of all the folders on your machine. Browse to the 'Windows' folder which is by default on your 'C' drive. Once you have done this click the 'Search' button at the bottom of the dialog box, as show below:

Step 4: Windows will now start searching that folder for files with the word 'view' in them. The files you are after are called wjview.exe and jview.exe. The reason the word 'view' was used as a search parameter was so both files are found.
Step 5: When these files are found simply rename them to something other than the name they started with. For example xwjviewx and xjviewx. These files are associated with the MS JVM so this forces the use of Sun's JVM.
Step 6: Restart your machine and try running/installing CallerIP again.
If you have any more trouble running or installing CallerIP then get in touch with support who will be happy to help.