# Live Smooth Streaming stopped working after I updated WSE from 4.7.4 to 4.7.5

**URL:** <https://community.wowza.com/t/live-smooth-streaming-stopped-working-after-i-updated-wse-from-4-7-4-to-4-7-5/52384>\
**Category:** Wowza Streaming Engine\
**Created:** [November 27, 2018, 4:24pm UTC](https://community.wowza.com/t/live-smooth-streaming-stopped-working-after-i-updated-wse-from-4-7-4-to-4-7-5/52384 "2018-11-27T16:24:18Z")\
**Posts on this page:** 1\
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**Author:** ![Koji\_Mukoyama](https://avatars.discourse-cdn.com/v4/letter/k/a5b964/32.png) [@Koji\_Mukoyama](https://community.wowza.com/u/Koji_Mukoyama)\
**Post date:** [November 27, 2018, 4:24pm UTC](https://community.wowza.com/t/live-smooth-streaming-stopped-working-after-i-updated-wse-from-4-7-4-to-4-7-5/52384/1 "2018-11-27T16:24:18Z")

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Hello

I had updated WowzaStreamingEngine 4.7.4 to 4.7.6

But it can not play live stream using smooth streaming.

I think it is bug. So I have verified this problem with WSE 4.7.4 and 4.7.5.

I tested it using WSE 4.7.4 and 4.7.5.

(Ingest: RTMP, Output: Smooth Streaming and HLS. And hls is no problem)

How to reproduce.

1. Install WSE 4.7.4 and 4.7.5

2. Comment ModuleCoreSecurity out in conf/live/Application.xml and set false at securityPublishRequirePassword

3. Set a .smil file at content/test.smil

4. Publish 3 streams using Wirecast

5. Check using Silverlight test player on IE11

Then

- 
## 4.7.4: works
- 
## 4.7.5: doesn’t work

  - Always returns 404 Not Found for audio segments.

Maybe WSE 4.7.5 or later have the same problem with Smooth Streaming in live.

It may be caused by related to this update.

[https://www.wowza.com/docs/wowza-streaming-engine-4-7-5-release-notes](https://www.wowza.com/docs/wowza-streaming-engine-4-7-5-release-notes)

Thank you

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