eventHandler does often not receive a message

Hi,

I got a very simple test:
On computer A a BPEL process invokes an asynchronous call to computer B. Afterwards it waits for 15 seconds. Furthermore an eventHandler is launched waiting for the response from B and throw an exception when activated.

B is an echo service which simply returns the string it gets.

Additionally I watch the network traffic using wireshark.

Because the computer standing next to each other there are no high reponse times. Therefore 15 seconds should be enough to receive the reply. I'd expected getting an exception everytime I call the BPEL process. But very often this doesn't happen. But everytime I get the answer from B (wireshark tells me).

So I guess there is a bug with the eventHandler?