Try using the TS Unprocesssed ot TS profile as a base and change the ext to MP4.
If you are looking to change without remuxing to TS then refer to the forum on WTV and H264 thread which will allow you to keep the H264 without changing to MPEG2 and then use the above customized profile.
Cannot say if it'll work on 2.3.11 but should work on 2.3.12 or later.