Launcher dowloads up to 100% then closes

[Jlebuddy]

Launcher Version: Tekkit 3.1

Operating System: Windows 7 64-bit

Java Version: jre7 update 5

Antivirus Program: Microsoft security essential

Description of Problem:

When I open the launcher, it loads to 100% then it closes automatically. In the folder in Roaming there is the .jar file but if i double click on it, it asks me which application i want to use to open the file. I clicked on java but it does not work and says -- Unable to launch the application -- .

(I looked at most threads on this forum before posting)

Error Messages:

Error Log:

[Torezu]

Make sure you only have one copy of Java installed. If not, remove any extra ones.

[Jlebuddy]

I looked and I have only one java version installed. When I use java with the .jar file in %appdata% the error is full of unknown symbol then in the exception field its written :

MissingFieldException[ The following required field is missing from the launch file: <jnlp>]

at com.sun.javaws.jnl.XMLFormat.parse(Unknown Source)

at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(Unknown Source)

at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(Unknown Source)

at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(Unknown Source)

at com.sun.javaws.Main.launchApp(Unknown Source)

at com.sun.javaws.Main.continueInSecureThread(Unknown Source)

at com.sun.javaws.Main$1.run(Unknown Source)

at java.lang.Thread.run(Unknown Source)

[Jlebuddy]

^

[Torezu]

You probably need to reinstall Java, making sure you have the 64-bit version.