Called program file not found in drive/directory.(Visual COBOL 2.1 for RedHat)

I called a native COBOL program in a junit JVM COBOL.(CALL "SS2401" USING SS2401-IN)But when I run the JVM COBOL in
the command line,there is a error.[Called program file not found in drive/directory (173)]
I already set the path of native COBOL up in the $COBPATH,$PATH and $CLASSPATH and runned the cobsetenv script to set up my environment.
And in the path of native COBOL's folder ,there are SS2401.so and SS2401.o files.

Thanks!

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[root@rhcs32 bin]# java org.junit.runner.JUnitCore junit.SS2401_test
JUnit version 4.8.2
.E.E
Time: 0.157
There were 2 failures:
1) test1(junit.SS2401_test)
com.microfocus.cobol.program.COBOLProgramNotFound: Called program file not found in drive/directory (173) [SS2401]
at com.microfocus.cobol.program.Control.callReturningObject(Unknown Source)
at com.microfocus.cobol.program.Control.call(Unknown Source)
at junit.SS2401_test.test1(SS2401_test.cbl:153)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at junit.framework.TestCase.runTest(TestCase.java:168)
at junit.framework.TestCase.runBare(TestCase.java:134)
at junit.framework.TestResult$1.protect(TestResult.java:110)
at junit.framework.TestResult.runProtected(TestResult.java:128)
at junit.framework.TestResult.run(TestResult.java:113)
at junit.framework.TestCase.run(TestCase.java:124)
at junit.framework.TestSuite.runTest(TestSuite.java:243)
at junit.framework.TestSuite.run(TestSuite.java:238)
at org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:83)
at org.junit.runners.Suite.runChild(Suite.java:128)
at org.junit.runners.Suite.runChild(Suite.java:24)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
at org.junit.runner.JUnitCore.run(JUnitCore.java:157)
at org.junit.runner.JUnitCore.run(JUnitCore.java:136)
at org.junit.runner.JUnitCore.run(JUnitCore.java:117)
at org.junit.runner.JUnitCore.runMain(JUnitCore.java:98)
at org.junit.runner.JUnitCore.runMainAndExit(JUnitCore.java:53)
at org.junit.runner.JUnitCore.main(JUnitCore.java:45)
]

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