| I am having problems with the chat and virtual classroom tools. What should I do?
If you are having problems with lightweight chat or the virtual classroom tool, please make sure that:
- You are using a browser that supports these applications.
- That you have the correct version of Java installed.
- That you have only ONE version of Java installed. If not, uninstall all versions and re-install the correct one.
- That any software you have installed to block pop-ups is either disabled or configured to allow pop-ups when using Blackboard.
If you have done all of these things and still have problems, you should clear your JAR cache and then trying using lightweight chat or the virtual classroom.
What is JAR cache and why might I need to clear it?
Blackboard makes heavy use of JAR files. Java code for applets is stored in Java Archive or JAR files. When you use a JAR file, it is saved on your hard drive in your JAR cache so it does not need to be fetched from the server if it is needed again. This is done so your application will start up much faster. Like browser cache, your JAR cache can become corrupted. Clearing it will force the browser to go out to the server to download the JAR file before launching the application.
How to clear your JAR cache on Windows Vista:
- On the Start Menu, select Control Panel.
- Select the Classic View.
- On the Control Panel, double-click Java to open the Java Plug-in Control Panel.
- If it is not already open, click the General tab.
- Under Temporary Internet Files, click the Delete Files ... button and click "OK" to confirm your request.
- Click "OK" again to close the Java Plug-in Control Panel.
- Close all browsers and other programs.
- Restart your computer.
How to clear your JAR cache on Windows XP:
- On the Start Menu, select Control Panel.
- On the Control Panel, double-click Java to open the Java Plug-in Control Panel.
- If it is not already open, click the General tab.
- Under Temporary Internet Files, click the Delete Files ... button and click "OK" to confirm your request.
- Click "OK" again to close the Java Plug-in Control Panel.
- Close all browsers and other programs.
- Restart your computer.
How to clear your JAR cache on Mac OS X:
- On the hard drive, go to /Applications/Utilities/Java/
- Launch "Java Web Start".
- Under the "Java Web Start" menu in the top MacOS toolbar, select Preferences...
- Click on the "Advanced" tab.
- In the bottom pane, click on "Clear Folder".
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