Getting error in Access Control

[#1]

I am trying to do Access Control in my proxy.But getting below error.

Invalid value : /ALLOW for attribute action in MatchRule. Allowed values are [ALLOW, DENY].

I am just trying to do the same sample given in the docs page.

<AccessControl name="ACL">
  <IPRules noRuleMatchAction="/DENY">
    <MatchRule action="/ALLOW">
      <SourceAddress mask="16">10.10.10.10</SourceAddress>
    </MatchRule>
  </IPRules>
</AccessControl>

Its not working.Please suggest what I am missing.