youtube code is not working!

hi! i have this problem:
sometimes when i write the youtube code

Code:

[youtube]http://blablabla[/youtube]

it doesnt work, though it says 'BbCode is on'. so what is wrong then???

you have to put the embed-code in between this tabs.

thanx! but i discovered why it happened. i was doing something wrong with the links (so there were no problems with the code itself )

I just copy and paste the embedded code into my forum...It should look something like this..

<object width="425" height="355"><param name="movie" value="http://www.youtube your video"></param><param name="wmode" value="transparent"></param><embed src="http://www.youtubyour video/v/obcTb6GTRy0&rel=1" type="application/x-shockwave-flash" wmode="transparent" width="425" height="355"></embed></object>

Works every time.

thank you !