See JT/ST Repository.
Please make sure you have configured Eclipse to use JRE 1.5. To do this go to
Windows → Preferences and then select
Java → Compiler. Click on the
Configure.. link and add a JRE/JDK Version 1.5.
Run eclipse with at least 512 MB of memory:
eclipse -consoleLog -clean -vmargs -Xmx512M -Xms512M
-consoleLog logs exceptions not just to the console but additionally to the
.log file in the .metadata project.
Of course you have to start eclipse from a console (cmd, gnome-terminal, etc.) to see the messages.
For more eclipse command line option see the documentation.