/targetmode, /tmode don't work when no subcommand is specified

[Umo]

From "Patch 1.16a Notes" thread:

* Targeting modes can also be activated using the /targetmode (/tmode) text command.
/targetmode(/tmode) [subcommand]
>>Subcommands
　a 　Switch to targeting mode A
　b 　Switch to targeting mode B
　Toggle between targeting mode A and B when no subcommand is specified.


Platform:
Windows

ISP:
Movistar

Type of Internet Connection:
DSL

Internet Connection Speed:
10Mbit/s

Date & Time:
03/29/2011 01:45 GMT+1

Frequency:
Always

Character Name:
Umo Heima

Race:
Hyur M

World:
Gysahl

Class/Skill Rank:
Culinarian/18

Physical Level:
50

Area and Coordinates:
Western Thanalan > Horizon's Edge (13, 29)

Party or Solo:
Solo

NPC Name:
None

Monster Name:
None

In-Game Time:
16:34

Steps:
- I was doing nothing when the issue ocurred, just standing on the ground (I mean, no guildleve, behest, mission,...)
- Typed /tmode (without subcommand) and I got "/tmode" on my General chat window. Nothing occurred.
- Typed /targetmode (without subcommand) and I got "/targetmode" on my General chat window. Nothing ocurred.