MVC partial View

Question

I have a _Layout.cshtml in mvc4 web application, in this master view i am calling a partial view for menu which is strongly type , now I have created a new strongly typed partial view for service menu link I have wrote the code to get data from database , But now when i click on the service menu link i am getting the below error message 

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The model item passed into the dictionary is of type 'System.Collections.Generic.List`1[BusinessApplicationTemplate.Models.Service]', but this dictionary requires a model item of type 'System.Collections.Generic.IEnumerable`1[BusinessApplicationTemplate.Models.slider]'.

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why it is so