Artifacts publishing problem

Hello. We installed the TeamCity Professional License (v 8.15) on a Windows 7 Professional machine and one build agent on the same machine. After performing about 20 successful builds (including publishing of artifacts), the build server agent is no longer capable of publishing artifacts. The builds are still successful. See log below. We disabled antivirus protection and firewall but with no success. Does anybody have any ideas how to fix this?

[2014-11-21 19:11:27,579]   INFO - buildServer.AGENT.registration - Server confirmed we are still registered
[2014-11-21 19:11:27,579]   INFO - r.agent.impl.AgentLogProxyImpl - Ping OK and registered on the server again: 23
[2014-11-21 19:11:27,579]   INFO - r.agent.impl.AgentLogProxyImpl - Pending remote commands count: 6
[2014-11-21 19:11:27,579]   INFO -    jetbrains.buildServer.AGENT - Start: Publishing files using WebPublisher
[2014-11-21 19:11:27,798]   INFO -    jetbrains.buildServer.AGENT - Start: Publishing files using ArtifactsCachePublisher
[2014-11-21 19:11:30,840]   WARN -    jetbrains.buildServer.AGENT - Failed to publish artifacts [D:\BuildAgent\temp\buildTmp\ZipPreprocessor2437893383097425848\UpgradePackage_5.30.1.1.22_2759.zip (size: 149123590)] because of error: java.net.SocketException: Connection reset by peer: socket write error, will try again.
[2014-11-21 19:11:30,840]   WARN -    jetbrains.buildServer.AGENT - Failed to publish artifacts: Connection reset by peer: socket write error, will try again
[2014-11-21 19:11:30,840]   WARN - r.agent.impl.AgentLogProxyImpl - Remote command Publishing to Result/UpgradePackage_5.30.1.1.22_2759.zip failed 10 times, error: jetbrains.buildServer.agent.ArtifactPublishingFailedException: Connection reset by peer: socket write error