How to srike out text in vbulletin

[postcd]

I seen advices like:

<strike>text</strike>

text

[ s ]text[ /s ]

<s>text</s>

..in source/visual editor, but it dont strike the text in my vbulletin 4.1.11

[WEBDosser]

Do you have HTML turned on?.

[postcd]

this guide worked: http://www.vbulletin.com/forum/forum/vbulletin-legacy-versions-products/legacy-vbulletin-versions/vbulletin-3-6-questions-problems-and-troubleshooting/270486-strike-out-code?p=2490214#post2490214