How to use Emma code coverage in jdk1.7?

Recently i moved jdk1.6 to jdk1.7.Emma code coverage tool working fine in jdk1.6.but It did not working in jdk1.7.It throws following error.

emma:
[emmajava] EMMA: no coverage data collected at runtime [all reports will be empty]
[emmajava] [EMMA v2.0, build 5312]
[emmajava] emmarun: [MAIN_METHOD_NOT_FOUND] application class does not have a runnable public main() method
[emmajava] Exception in thread "main" com.vladium.emma.EMMARuntimeException: [MAIN_METHOD_NOT_FOUND] application class does not have a runnable public main() method
[emmajava] at com.vladium.emma.rt.AppRunner._run(AppRunner.java:497)
[emmajava] at com.vladium.emma.rt.AppRunner.run(AppRunner.java:97)
[emmajava] at com.vladium.emma.runCommand.run(runCommand.java:247)
[emmajava] at emmarun.main(emmarun.java:27)
[emmajava] Caused by: java.lang.ClassFormatError: Illegal local variable table length 5 in method ()V
[emmajava] at java.lang.Class.getDeclaredMethods0(Native Method)
[emmajava] at java.lang.Class.privateGetDeclaredMethods(Unknown Source)
[emmajava] at java.lang.Class.getMethod0(Unknown Source)
[emmajava] at java.lang.Class.getMethod(Unknown Source)
[emmajava] at com.vladium.emma.rt.AppRunner._run(AppRunner.java:493)
[emmajava] ... 3 more

How to solve this? I need to know emma code coverage tool running jdk1.7?