[SOLVED] ERROR:java.net.SocketException: Connection reset

hi support,

i noticed that every time i run a request against our REST service soapui is returning me the given error.
what is interesting is that the rest call is successfully received and processed by the server and the HTTP response header is correct.
the fact is that this error is displayed every time i run a request.
also, i noticed that this just happens when running a POST. it does not happens on GET or DELETE. didn't tried with PUT or HEAD.

i am using soapui Pro 4.0.1. can anyone help me with this?

below is the log file:

    Wed Nov 23 14:21:28 EST 2011:ERROR:java.net.SocketException: Connection reset
       java.net.SocketException: Connection reset
          at java.net.SocketInputStream.read(Unknown Source)
          at java.io.BufferedInputStream.fill(Unknown Source)
          at java.io.BufferedInputStream.read(Unknown Source)
          at org.apache.commons.httpclient.WireLogInputStream.read(WireLogInputStream.java:81)
          at org.apache.commons.httpclient.ChunkedInputStream.readCRLF(ChunkedInputStream.java:204)
          at org.apache.commons.httpclient.ChunkedInputStream.nextChunk(ChunkedInputStream.java:219)
          at org.apache.commons.httpclient.ChunkedInputStream.read(ChunkedInputStream.java:176)
          at java.io.FilterInputStream.read(Unknown Source)
          at org.apache.commons.httpclient.AutoCloseInputStream.read(AutoCloseInputStream.java:108)
          at java.io.FilterInputStream.read(Unknown Source)
          at org.apache.commons.httpclient.AutoCloseInputStream.read(AutoCloseInputStream.java:127)
          at com.eviware.soapui.support.Tools.writeAll(Tools.java:402)
          at com.eviware.soapui.impl.wsdl.submit.transports.http.HttpMethodSupport.getResponseBody(HttpMethodSupport.java:149)
          at com.eviware.soapui.impl.wsdl.submit.transports.http.support.methods.ExtendedPostMethod.getResponseBody(ExtendedPostMethod.java:130)
          at com.eviware.soapui.impl.wsdl.submit.transports.http.SinglePartHttpResponse.<init>(SinglePartHttpResponse.java:49)
          at com.eviware.soapui.impl.wsdl.submit.filters.HttpPackagingResponseFilter.httpRequest(HttpPackagingResponseFilter.java:78)
          at com.eviware.soapui.impl.wsdl.submit.filters.HttpPackagingResponseFilter.afterAbstractHttpResponse(HttpPackagingResponseFilter.java:44)
          at com.eviware.soapui.impl.wsdl.submit.filters.AbstractRequestFilter.afterRequest(AbstractRequestFilter.java:64)
          at com.eviware.soapui.impl.wsdl.submit.transports.http.HttpClientRequestTransport.sendRequest(HttpClientRequestTransport.java:228)
          at com.eviware.soapui.impl.wsdl.WsdlSubmit.run(WsdlSubmit.java:123)
          at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
          at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
          at java.util.concurrent.FutureTask.run(Unknown Source)
          at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
          at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
          at java.lang.Thread.run(Unknown Source)