asp.net mvc - MVC RememberMe Validation Glitch -

in mvc project validator unintentionally requires rememberme checkbox checked upon logging in. on ie8, not allow user login unless tick remember me box. other browsers fine including ie7.

<input id="rememberme" type="checkbox" value="true" name="rememberme" data-val-required="the remember me? field required." data-val="false">  

i tried change property in entity framework nullable bool? produces error:

the best overloaded method match 'webmatrix.webdata.websecurity.login(string, string, bool)' has invalid argument  

so, doesn't able change fix issue. have tried on writing property jquery gets changed back. random , i'm suprised got on looked out of box technology. appreciated.

here login model:

public class loginmodel {     [emailaddressattribute]     [required]     [stringlength(80)]     [display(name = "email address")]     public string username { get; set; }      [required]     [datatype(datatype.password)]     [display(name = "password")]     public string password { get; set; }      [display(name = "remember me?")]     public bool rememberme { get; set; } } 

and controller login, can see out of box mvc stuff:

[httppost] [allowanonymous] [validateantiforgerytoken] public actionresult login(loginmodel model, string returnurl) {     if (modelstate.isvalid && websecurity.login(model.username, model.password, persistcookie: model.rememberme))     {         return redirecttolocal(returnurl);     }      // if got far, failed, redisplay form     modelstate.addmodelerror("", "the user name or password provided incorrect.");     return view(model); } 

and here view:

@html.validationsummary(true)  <ol class="form">     <li>         @html.labelfor(m => m.username)         @html.textboxfor(m => m.username, new { id="txusername" })         @html.validationmessagefor(m => m.username)     </li>     <li>         @html.labelfor(m => m.password)         @html.passwordfor(m => m.password)         @html.validationmessagefor(m => m.password)     </li>     <li>         @html.labelfor(m => m.rememberme, new { @class = "checkbox" })         @html.checkboxfor(m => m.rememberme)     </li>     <li class="form-buttons">         <input type="submit" value="log in" /> &nbsp; @html.actionlink("forgot password", "forgotpassword", "account")     </li> </ol> 

after doing research, said caused ie7 & ie8 compatibility mode in internet explorer 10 only.

it cause other problems unobtrusive jquery validation running under same conditions.