Application Error (JVM crashes and hangs)

Hi, this is my problem:-)
When I call any method of the stub of the COM object (not only the business
logic), I recieve acceptable result, but when leaving the main method (more
precisely private void exit() on Thread when destroying the JVM), error
window with message: "the instruction at xxx referenced memory at xxx. The
memory could not be read" pops up and the thread hangs.

Here is the code...(nothing surprising I guess....)
....
Ole32.CoInitialize();
//generated stub for COM object writen in MS Fox and accessing Clipper DBF
file through the ODBC
Inetwrs net = new Inetwrs(netwrs.CLSID);
//here I call method which writes something to the DB and it really does
it...!!!!!!
Object o = net.zapis();
Ole32.CoUninitialize();
...


I tried combinations of jvm 1.3.1_15, 1.4.1_01,03, 1.5.0_01 and jawin
1.0.19 and 2.0A all with the same result..

Any ideas?
thx very much, Mirek