# Wowza Media Server 3 Control Panel | Not Working

**URL:** <https://community.wowza.com/t/wowza-media-server-3-control-panel-not-working/47701>\
**Category:** Wowza Streaming Engine\
**Created:** [November 14, 2016, 12:01pm UTC](https://community.wowza.com/t/wowza-media-server-3-control-panel-not-working/47701 "2016-11-14T12:01:33Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Muhammad\_Faheem\_Ahme](https://avatars.discourse-cdn.com/v4/letter/m/46a35a/32.png) [@Muhammad\_Faheem\_Ahme](https://community.wowza.com/u/Muhammad_Faheem_Ahme)\
**Post date:** [November 14, 2016, 12:01pm UTC](https://community.wowza.com/t/wowza-media-server-3-control-panel-not-working/47701/1 "2016-11-14T12:01:33Z")

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Hi,

I have Wowza Media Server 3 Perpetual Edition licence and i have installed 3.5.2 version successfully.

The issue is, when i start server and verifying its status from http://[wowza-ip-address]:1935

It gives error: The Wowza Media Systems Software licensing system has determined that your license key is not valid. Please validate that your are using the correct license key.

Would you please guide me why i am facing this error and how it can be resolved.

Can license key of Wowza Media Server 3 Perpetual Edition work on 3.5.2 version?

Thank you

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**Author:** ![Alex\_C](https://avatars.discourse-cdn.com/v4/letter/a/bbe5ce/32.png) [@Alex\_C](https://community.wowza.com/u/Alex_C)\
**Post date:** [November 19, 2016, 1:30am UTC](https://community.wowza.com/t/wowza-media-server-3-control-panel-not-working/47701/2 "2016-11-19T01:30:13Z")

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I would first confirm the license key you entered is correct. You’ll find the license key in the Server.license file located at [install-dir]/conf/Server.license.

Regards,

Alex