compiler-construction debugging eclipse java

How to debug .class files in ECLIPSE?

I am using Eclipse 3.5 and I attached the to my global settings in Eclipse.
Windows–> Preferences –>Java –>Installed JREs –>rt.jar – Source attachment – …../jdk/

I am successfully able to step in the java core library .class files and view the source code. I building a Class which uses the LinkedList and I have set a breakpoint inside the LinkedList class.

When I debug the breakpoints in my source code (my projects) are working good but when I need to step into the java core lib .classes I get the following error in my Eclipse
eclipse error

Unable to install breakpoint in java.util.LinkedList due to missing line Number attributes. Modify complier options to generate line number attributes.

I checked my complier settings in Preferences and found all options checked true.
enter image description here
It would to great if someone can help me resolve this issue.

Thanks in advance.