App settings question

Okay, so lets say you have app setting like this:
<setting propertyKey="@Properties.myString" title="@Strings.MyStringTitle" prompt="@Strings.MyStringPrompt">
<settingConfig type="list">
<listEntry value="0">@Strings.example1</listEntry>
<listEntry value="1">@Strings.example2</listEntry>
<listEntry value="2">@Strings.example3</listEntry>
</settingConfig>
</setting>

If you then select example 2 this will appear under the list:
<setting propertyKey="@Properties.myNumber" title="@Strings.MyNumberTitle" prompt="@Strings.MyNumberPrompt">
<settingConfig type="numeric"/>
</setting>

Else if you select example 1 or example 3 the number setting will not be seen

THX for help! :D