member translation fix

app/views/devise/sessions/new.html.erb

@@ -11,8 +11,8 @@
 			<p class="alert hide">You need to sign in or sign up before continuing.</p>
 			<div class="main">
 				<div class="control-group clear">
-					<%= f.label :user_id ,t(:user_id)%>
-					<%= f.text_field :user_id, :placeholder => t(:email), :style => "width: 330px;" %>
+					<%= f.label :user_id ,t("users.user_id")%>
+					<%= f.text_field :user_id, :placeholder => t("users.user_id"), :style => "width: 330px;" %>
 					<span class="help-inline">Please correct the error</span>
 				</div>
 				<div class="control-group clear">