I migrated SP 2010 site collection to my new SP 2013 using db backup process from here
Site is working fine but the custom web parts I created in SP 2010 is not visible in SP 2013. Below error is shown in place of my web part.
[Web Part Error: A Web Part or Web Form Control on this Page cannot be displayed or imported. The type DemoSharePointUserControl.LyncWebPart.LyncWebPart, DemoSharePointUserControl, Version=184.108.40.206, Culture=neutral, PublicKeyToken=3656b399b713ff03 could not be found or it is not registered as safe. Correlation ID: 2d9c179c-2f58-5051-5762-87aea7d1d9ef]
How can I solve it??
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