Junit 4 checkbox in jmeter getting cleared when running test -

i wrote junit 4 test case. test using selenium web driver. works fine when running eclipse. copied exported jar file jmeter lib/junit folder. class name , test name populating when selecting search junit 4 annotations checkbox. can find screenshot.

but start load test clicking green play button, search junit 4 annotations checkbox gets cleared , thereby no class , test name passed load test. please guide me.

my class not extending testcase.

import junit.framework.testcase;

then extend class testcase. resolved issue.