Java Unsatisfied Link Error IBM CICS Explorer

I have got this java project in IBM CICS Explorer and target platform has been set to CICS 5.3. When I run the java class I get this error:

Exception in thread "main" java.lang.UnsatisfiedLinkError: com/ibm/cics/server/Task.getCommonData()V
    at com.ibm.cics.server.Task.<init>(Task.java:332)
    at com.ibm.cics.server.Task.getTask(Task.java:944)

Can anyone please help me with this?