Angularjs - IE8 in IE7 modus (and in IE8 compatibility modus) not working properly

I'm having a little problem with Angularjs version 1.0.1. I created an app and tested it in IE8 in IE7 modus and it is not listening to ng-change nor ng-click, didn't test other handles but at least those two don't work for me... (all other browsers are just fine) I hope you guys can help me with this, or maybe I'm missing something here... Is there a special treatment for IE7/8?

Here you see the controller:

CalculatorCtrl = function($scope) {
    $scope.btw = 1;
    $scope.input = 0.00;
    $scope.output = 0.00;

    $scope.getBedrag = function() {
        var input = $scope.input;
        var btw = $scope.btw;       
        var output = 0.0;

        if(input != 0) {
            input = parseFloat(input.replace (",", "."));
            var tmp = input+"";
            $scope.input = tmp.replace(".", ",");
        }

        if($scope.isNumber(input)) {
            output = $scope.calculateBedrag(input);

            if(btw == 1) output = output * 1.19;

            $scope.output = output.toFixed(2).replace('.', ',');
        } else {
            //alert('Voer een bedrag in a.u.b.');
            $scope.input = 0;
            $scope.output = 0;
        }
    }
}

In the html I simply use:

<input autocomplete="off" ng-model="input" class="x-width" type="text" name="bedrag" value="" ng-change="getBedrag()" />
<input class="x-width" disabled="disabled" type="text" name="bedrag" value="{{output}}" />

Hope someone can help me :)

Edit: Wel I tried IE Tester to in IE7 modus, didn't work either. I don't have any machine with real IE7 on it, so I can't test that...