Problems with using Dancer abilities and casting Drain on target

Platform:Xbox 360
ISP:
Type of Internet Connection:UK Broadband
Internet Connection Speed: Unknown
Date & Time:16/11/2012 - 10:30am
Frequency: Constant
Character Name: Tinyneil
Race: Tarutaru M
World: Shiva
Main Job: DRK
Support Job: DNC
Area and Coordinates: Port Jeuno - Mog House
Party or Solo: Solo
NPC Name: Mistamdo
Monster Name: None

Steps:

1.Tried to use my DNC abilities while working on DRK and found I could use neither use Curing Waltz, Drain (DRK spell) or Drain Sambas. This happened constantly.

2. I contacted the GM to see if there was anything that can be done. I was contacted by GM Mistamdo 20 minutes later and discussed the situation, I was told to Log out and perform a system check incase of a problem. If nothing showed and if it still didn't work then I was to report on here about the issue.

3. So I logged out and performed a system check and there were no problems shown, so I logged back on but again and changes jobs to see if it wasn't to do with any of my other jobs, I was able to cure myself on WHM but when I changed back to DRK, I still couldn't use the DNC abilities or Cast Drain.

4. I have tried to use the same thing as WAR/DNC but still nothing works.
<*Add more steps if necessary.>

Greetings Tinyneil,

Thank you very much for posting your concern over not being able to use Waltzes or Drain on your character while having Dancer as your Sub-Job. Before we would be able to put in this to be investigated for you, we would need some additional information on this issue. Are you able to use the abilities/spell at all? Or when you use them on yourself do they have no effect on your character? (e.g. heals for 0) And if it is the latter case, would you please be able to tell us the items that you have equipped when you do the abilities/spell. While some of this information may seem irrelevant, it is best to have as much information as possible in these cases. Once you can provide the information we can get this issue sorted out for review for you. Thank you again for your report!

Do you have the Accursed Belt equipped? This belt has a hidden effect of Zombie and will not allow you to be cured.

http://wiki.ffxiclopedia.org/wiki/Accursed_Belt