Dynamic text box won't recognize Image code

Hi

The Dynamic text box which i have used doesnt recognise<image tag HTML code …it recognise <b>…<br> etc…
Can anyone help?

also though i have used <img src=“http://lcoalhost/1.gif”>

It shows me img src=“http://lcoalhost/1.gif” in the box…why its not showing the image?

Any gurus out there