Multiple users not saving on sharepoint list.

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SharePoint2010

I have created a visual webpart on list add new item form,edit form and view from.This Visual web part contains a SharePoint:PeopleEditor to add the users under sharepoint list with below properties.

<SharePoint:PeopleEditor ID="user" runat="server" SelectionSet="User" AllowEmpty="false" Enabled="false" MultiSelect="true" MaximumEntities="5" ValidatorEnabled="false" />

When i add the multiple users under a list it is taking multiple users, but when i save the item it is showing single user.

Please advice how to display multiple user on list items.