Could be a timeout, try to set the HTTP timeout higher to see if that helps. The strange thing is that you have HTTP response in the log so that should not be a problem. Did you install the 7.3 hotfixes?
Could be a timeout, try to set the HTTP timeout higher to see if that helps. The strange thing is that you have HTTP response in the log so that should not be a problem. Did you install the 7.3 hotfixes?