Since your original post there have been a view updates that may resolve this issue that you can try.
First is to make sure that you have the latest AMT ME firmware applied which was posted 2/09. http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareDescription.jsp?lang=en&cc=us&prodTypeId=12454&prodSeriesId=3459240&prodNameId=3459243&swEnvOID=1093&swLang=13&mode=2&taskId=135&swItem=vc-68791-1
Next is another possible remedy involving the NIC firmware posted 6/09. http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareDescription.jsp?lang=en&cc=us&prodTypeId=12454&prodSeriesId=3459242&swItem=vc-72171-1&prodNameId=3459247&swEnvOID=2098&swLang=13&taskId=135&mode=4&idx=0
If the issue still persists there are additional fixes for similar behavior that should soon be released in future AMT FW Updates. These will be available on the HHP site as soon as they have been certified by HP so keep a watch at: http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareIndex.jsp?lang=en&cc=us&prodNameId=3459243&prodTypeId=12454&prodSeriesId=3459240&swLang=13&taskId=135&swEnvOID=2096
Digital Office - Problem Resolution Engineering
Intel Corporation - Digital Enterprise Group