radiobuttonlist exception


after i upgraded beta, i'm carrying problem html.radiobuttonlist. someone arrangement me i'm doing wrong?



the code:



<% html.radiobuttonlist(
    "voter" + voter.id,
    new selectlist(new[]{"yes","no","abstain"}, "yes")).each(x => response.write(x)); %>


and difference i get:



[argumentnullexception: value can't null.
parameter name: value]
   system.web.mvc.html.inputextensions.radiobutton(htmlhelper htmlhelper, twine name, vigilant value, boolean ischecked, idictionary`2 htmlattributes) +214
   microsoft.web.mvc.<>c__displayclass1.<radiobuttonlistinternal>b__0(listitem item) c:\dd\cicero\src\mvc\main\src\mvcfutures\mvc\radioextensions.cs:86
   system.linq.whereselectlistiterator`2.movenext() +107
   system.linq.buffer`1..ctor(ienumerable`1 source) +259
   system.linq.enumerable.toarray(ienumerable`1 source) +81
   microsoft.web.mvc.radiolistextensions.radiobuttonlistinternal(htmlhelper htmlhelper, twine name, selectlist selectlist, boolean usedviewdata, idictionary`2 htmlattributes) c:\dd\cicero\src\mvc\main\src\mvcfutures\mvc\radioextensions.cs:88
   microsoft.web.mvc.radiolistextensions.radiobuttonlist(htmlhelper htmlhelper, twine name, selectlist selectlist) c:\dd\cicero\src\mvc\main\src\mvcfutures\mvc\radioextensions.cs:29


many interjection advance!

rob



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