If you are using IIS to run you application. Then your problem lies with the <requestFiltering> section.

This errors occurs, because IIS default only allows 30MB uploads due to security reasons.

<system.webServer>     

<security>         

<requestFiltering>             

<requestLimits maxUrl="10999" maxQueryString="9999" maxAllowedContentLength="2147483648" />       

</requestFiltering>     

</security> 

</system.webServer>