Current Airspace Frequency?

[n4gix]

I have the following XML script working perfectly except for the Current Airspace Frequency (@c:NearestAirspaceCurrentFrequency), which remains INOP. Has anyone an idea what I'm leaving out?

<Element>
	<Position X="512" Y="455"/>
	<FormattedText X="380" Y="188" Font="Glass Gauge" FontSize="20" LineSpacing="18" Adjust="Left" Color="Cyan" Bright="Yes" Tabs="0,5R,20R,150R">
		<Font FontSize="14"/>
		<Font FontSize="1"/>
		<String>
			%((@g:listCurrent) (>@c:NearestAirspaceCurrentLine) (@c:NearestAirspaceCurrentName) (>@c:NearestAirspaceCurrentFrequencyName) quit )%{end}
			%((@c:NearestAirspaceCurrentType))
			%{case}
			%{:0}NONE\{fnt2}
			%{:1}CENTER\{fnt2}
			%{:2}CLASS_A\{fnt2}
			%{:3}CLASS_B\{fnt2}
			%{:4}CLASS_C\{fnt2}
			%{:5}CLASS_D\{fnt2}
			%{:6}CLASS_E\{fnt2}
			%{:7}CLASS_F\{fnt2}
			%{:8}CLASS_G\{fnt2}
			%{:9}TOWER\{fnt2}
			%{:10}CLEARANCE\{fnt2}
			%{:11}GROUND\{fnt2}
			%{:12}DEPARTURE\{fnt2}
			%{:13}APPROACH\{fnt2}
			%{:14}MOA\{fnt2}
			%{:15}RESTRICTED\{fnt2}
			%{:16}PROHIBITED\{fnt2}
			%{:17}WARNING\{fnt2}
			%{:18}ALERT\{fnt2}
			%{:19}DANGER\{fnt2}
			%{:20}NATIONAL_PARK\{fnt2}
			%{:21}MODE_C\{fnt2}
			%{:22}RADAR\{fnt2}
			%{:23}TRAINING\{fnt2}
			%{end}
			%!s!\{fnt}\n
			MAX ALTITUDE:\t\t%((@c:NearestAirspaceCurrentMaxAltitude, feet))%!d!\{fnt1}FT\{fnt}\n
			MIN ALTITUDE:\t\t%((@c:NearestAirspaceCurrentMinAltitude, feet))%!d!\{fnt1}FT\{fnt}\n
			FREQUENCY:\t\t%((@c:NearestAirspaceCurrentFrequency,MHz) s0 0 &gt;)%{if}%l0%!3.3f!%{else}%----\{nr}
		</String>
	</FormattedText>
</Element>