Sudda ,
Sorry that you are seeing this issue with MyEclipse. We do not provide intrinsic support for third party plugins but will help you resolve this issue.
1) Can you check if the version of Jalopy is compatible with Eclipse 3.7, which is the base version for MyEclipse 10 ?
2) How did you add Jalopy plugin to MyEclipse? Please share the update site / eclipse plugin download weblink.