JOverseer help needed

Hi,
    My old laptop died a week or so ago and I have installed JOverseer on my new laptop (Java included). However when I start it up now I just get a top bar (with no menus) and an empty pane below it. The MS DOS window that starts the batch file has the error below in it, which seems to indicate that it cannot start a log file up somehow. Any help would be most apppreciative as I'm stumped. The new laptop is a Window 7 64bit model and I have both 16 bit and 64 bit Java installs on the laptop.

Gavin

C:\Program Files (x86)\JOverseer>java -Xmx384M -jar joverseer.jar log4j:ERROR setFile(null,true) call failed.
java.io.FileNotFoundException: log4j.log (Access is denied)
         at java.io.FileOutputStream.open(Native Method)
         at java.io.FileOutputStream.<init>(Unknown Source)
         at java.io.FileOutputStream.<init>(Unknown Source)
         at org.apache.log4j.FileAppender.setFile(FileAppender.java:289)
         at
org.apache.log4j.RollingFileAppender.setFile(RollingFileAppender.java
:165)
         at
org.apache.log4j.FileAppender.activateOptions(FileAppender.java:163)
         at
org.apache.log4j.config.PropertySetter.activate(PropertySetter.java:2
56)
         at
org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.j
ava:132)
         at
org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.j
ava:96)
         at
org.apache.log4j.PropertyConfigurator.parseAppender(PropertyConfigura
tor.java:654)
         at
org.apache.log4j.PropertyConfigurator.parseCategory(PropertyConfigura
tor.java:612)
         at
org.apache.log4j.PropertyConfigurator.configureRootCategory(PropertyC
onfigurator.java:509)
         at
org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurato
r.java:415)
         at
org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurato
r.java:441)
         at
org.apache.log4j.helpers.OptionConverter.selectAndConfigure(OptionCon
verter.java:468)
         at org.apache.log4j.LogManager.<clinit>(LogManager.java:122)
         at org.apache.log4j.Logger.getLogger(Logger.java:104)
         at
org.apache.commons.logging.impl.Log4JLogger.getLogger(Log4JLogger.jav
         at
org.apache.commons.logging.impl.Log4JLogger.<init>(Log4JLogger.java:1
08)
         at
sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

         at
sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)

         at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Sou
rce)
         at java.lang.reflect.Constructor.newInstance(Unknown Source)
         at
org.apache.commons.logging.impl.LogFactoryImpl.createLogFromClass(Log
FactoryImpl.java:1040)
         at
org.apache.commons.logging.impl.LogFactoryImpl.discoverLogImplementat
ion(LogFactoryImpl.java:838)
         at
org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactory
Impl.java:601)
         at
org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactory
Impl.java:333)
         at
org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactory
Impl.java:307)
         at
org.apache.commons.logging.LogFactory.getLog(LogFactory.java:645)
         at
org.joverseer.ui.JOverseerJIDEClient.<clinit>(JOverseerJIDEClient.jav

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