I have a C++ program that calls into JAVA through JNI interface.
With jdk1.4.2 it works fine, with JDK 1.5 it hangs and if I put
Xcheck:jni,  I get the error
FATAL ERROr in native method : wrong object class or method id passed
to JNI call with both JDKs. Can someone help me debug this problem.

at the line CallObjectMethod

Here's the code snippet:

jclass cls = env->FindClass("myclass");
jmethodID mid = env->GetMethodID(cls, "getdata",
                "(ILjava/lang/String;Ljava/lang/String;)Ljava/lang/Object;");
jstring jcon = env->NewStringUTF(iStr);
jstring jwork = env->NewStringUTF(wStr);
jobject jo = env->CallObjectMethod(cls,mid,1,jcon, jwork);