SOAP to Proxy : Asynchronous : SOAP response from adapter losing frequently

Hi All,

we have asynchronous soap to proxy scenario .

The webservice consumed to external system to post messages and expects just empty acknowledgment .

All fine ..But out of 50 requests 1 or 2 failing because of missing SOAP response.

If we look at the log , for failed cases there is no "SOAP: Response message leaving the adapter".

Any idea why for only some cases this response information is missing ?

Regards.,

Siva