IList<HtmlTable> allUsers = Find.AllByXPath returns no results, but it should

Hello,

I have a problem finding specific tag, which occurs only once. For example:

HTML code excerpt:

<table class="table" id="users-table">
<tbody>
<tr class="ng-scope" ng-click="user.id" ng-repeat="user in vm">
</tr>
</tbody>
</table>

Coded step used on HTML code above:

Manager.ActiveBrowser.RefreshDomTree();        
IList<HtmlControl> allUsers = Find.AllByXPath<HtmlControl>("table[@id='users-table']/tbody/tr");
int maxCount = allUsers.Count;
Log.WriteLine("Found: " + maxCount.ToString() + " elements.");

Problem that I'm facing:

If I run above coded step it returns maxCount = 0! Instead it should return 1, because one tr tag is available and can be found. If I use online XPATH validators they all return one result (one example of such validator http://codebeautify.org/Xpath-Tester). Let me know why this is happening and how can I solve this? If you have another idea how to solve my problem, please do let me know.

BR, Jurij