shortly, unable to install netbeans 4.1 :( and the tail of the log file is:

<logfile>
....
Finding a JVM
Checking user specified Java home directory => C:\Sun\AppServer\jdk\
Verifying JVM at C:\Sun\AppServer\jdk\bin\java.exe
   for JVM: Sun JDK 1.5.X for Windows
Executing launch script command: "C:\Sun\AppServer\jdk\bin\java.exe" -
cp "";"d:\tmp\LRE1F2.tmp\Verify.jar";""   "Verify" java.specification.version 
in working directory D:\gamze\downloads
Output from the launch script execution
StdOut:
1739021872

1.5


ErrOut:

Found matching JVM at C:\Sun\AppServer\jdk\
Matching JVM home is C:\Sun\AppServer\jdk\
Matching JVM file is d:\tmp\LRE1F3.tmp
Executing launch script command: "C:\Sun\AppServer\jdk/bin\java.exe" -
cp "";"d:\tmp\LRE1F4.tmp\setup.jar";"" -Dsun.java2d.noddraw=true -
Dtemp.dir="d:\tmp" -Dis.jvm.home="C:\Sun\AppServer\jdk" -Dis.jvm.temp="0" -
Dis.media.home="d:\tmp\LRE1F4.tmp\setup.jar" -
Dis.launcher.file="D:\gamze\downloads\netbeans-4_1-windows.exe" -
Dis.jvm.file="d:\tmp\LRE1F3.tmp" -Dis.external.home="D:\gamze\downloads"   -
Xms20m -Xmx60m  run  in working directory D:\gamze\downloads
Output from the launch script execution
StdOut:

ErrOut:
An unhandled error occurred -- specify system property "is.debug" for more 
information.

</logfile>

is this a known bug (i couldnot find stg like that), or simply my failure?? :)