HTTP Streaming

Has anyone experience with HTTP streaming (chunk mode) in webMethods release 7.x or 8 ?
We are trying to set up both a webM HTTP Client and Server that can send/receive large files up to 3Gb, but always encounter issues on the server side like the following:
java.lang.NullPointerException: null
at com.wm.net.HttpInputStream$ChunkedInputStream.getChunkLength(HttpInputStream.java:841)