WowAce

i enabled the "Capture /rolls" option. Then anounced to /rw to roll. After 30 sec passed, i clicked the person, who rolled at most. When i click on him, i get this error:

What steps will reproduce the problem?
1. Enable "Capture /rolls"
2. Anounce to /rw to roll, wait for all to roll, wait for 30 seconds.
3. Click the person, who got the most roll number.

What is the expected output? What do you see instead?
I think the expected should anounce the /rw as "The winner of roll...", instead, i get error (pasted below).

What version of the product are you using?
WoW: EU version, patch 3.0.2 installed.
XLoot: 0.9-30000-1 (as stated in curse client)
XLootMaster: 0.7-30000-1 (as stated in curse client)

Do you have an error log of what happened?
I have error message: "Interface\AddOns\XLootMaster\XLootMaster.lua:551: Usage: GiveMasterLoot(slot, index)"

Please provide any additional information below.
Thanks for keeping XLoot alive!!!!