Error processing file transfer proxy connection

I’'m using openfire on Windows 2003. It seems to be basically working, but I keep getting messages in the error.log file such as:

2007.08.06 10:56:09 [org.jivesoftware.openfire.filetransfer.proxy.ProxyConnectionManager$1$1.run(Pr oxyConnectionManager.java:110)

] Error processing file transfer proxy connection

java.io.IOException: Only SOCKS5 supported

at org.jivesoftware.openfire.filetransfer.proxy.ProxyConnectionManager.processConn ection(ProxyConnectionManager.java:138)

at org.jivesoftware.openfire.filetransfer.proxy.ProxyConnectionManager.access$100( ProxyConnectionManager.java:39)

at org.jivesoftware.openfire.filetransfer.proxy.ProxyConnectionManager$1$1.run(Pro xyConnectionManager.java:107)

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)

Although this error says it is related to file transfer, it doesn’'t actually seem to stop chat users from transferring files to each other. Can anyone tell me what user functionality the above error relates to? Does actually it stop something working (or does it just mean that some facility has to use SOCKS5 instead of something else)?

Thanks

I guess I should have mentioned: this is Openfire version 3.3.2.