HTML code in posts is trimmed

Hi
I don’t know why but everytime I try to paste any sort of html code, it is trimmed with ‘/>‘ towards the end of the code.

I got this code for my google calendar:

<iframe src="http://www.google.com/calendar/embed?src=harkinder%40yahoo.com&amp;chrome=NAVIGATION&amp;height=588" style=" border-width:0 " width="640" frameborder="0" height="588"></iframe>

and it turned into this….with the closing tag </iframe> gone…

<p align="center"><iframe src="http://www.google.com/calendar/embed?src=harkinder%40yahoo.com&amp;chrome=NAVIGATION&amp;mode=AGENDA&amp;height=573" frameborder="0" width="480" height="588" />

THEN…i tried HTML code for a flash object

ORIGINAL CODE:

<object width="500" height="580" align="middle"><param name="FlashVars" VALUE="ids=72057594105420237&names=Nihangs&userName=Captain Suresh&userId=79349001@N00&titles=on&source=sets"></param><param name="PictoBrowser" value="http://www.db798.com/pictobrowser.swf"></param><param name="scale" value="noscale"></param><param name="bgcolor" value="#ffffff"></param><embed src="http://www.db798.com/pictobrowser.swf" FlashVars="ids=72057594105420237&names=Nihangs&userName=Captain Suresh&userId=79349001@N00&titles=on&source=sets" loop="false" quality="best" scale="noscale" bgcolor="#ffffff" width="500" height="580" name="PictoBrowser" align="middle"></embed></object>

and it turned into this once i posted it into the rich text editor for my new page.. and clicked SAVE (i even tried changing it again using the HTML button in the rich-text-editor, BUT NO LUCK)

<object height="580" width="500" align="middle">
<param value="ids=72057594105420237&amp;names=Nihangs&amp;userName=Captain Suresh&amp;userId=79349001@N00&amp;titles=on&amp;source=sets" name="FlashVars" />
<param value="http://www.db798.com/pictobrowser.swf" name="PictoBrowser" />
<param value="noscale" name="scale" />
<param value="#ffffff" name="bgcolor" /></object>

Please advise…thank you
Ish