asp.net mvc 4 - Default Role Provider could not be found when using SimpleMembershipProvider -

i'm trying authorization working on asp.net mvc4, try use websecurity.

websecurity.initializedatabaseconnection("tradefairindia", "users", "id", "username", false); 

i've put global.asax, , error comes, "default role provider not found".

on internet read had add line of code web.config <rolemanager enabled="true" defaultprovider="aspnetsqlroleprovider">. had added because of previous errors.

how can resolve problem??

edit:

when change defaultprovider="simpleroleprovider" gives me new error. says

the type or namespace name 'data' not exist in namespace 'webmatrix' (are missing assembly reference?)

i fixed changing defaultprovider simpleroleprovider. second error fixed adding webmatrix.data reference, , going property's , put copy local on true. dont know how fixes it, if can elaborate nice.

here web.config bumps same prob:

<system.web>     //...     <membership defaultprovider="simplemembershipprovider">       <providers>         <clear />         <add name="simplemembershipprovider" type="webmatrix.webdata.simplemembershipprovider, webmatrix.webdata" />       </providers>     </membership>     <rolemanager enabled="true" defaultprovider="simpleroleprovider">       <providers>         <clear />         <add name="simpleroleprovider" type="webmatrix.webdata.simpleroleprovider, webmatrix.webdata" />       </providers>     </rolemanager>     //... </system.web>