IE 6 and absolute positioning

I have a panel on my webpage with the following css :

Code:

---

.pnlParameterCollectionStyle
{               
        position:absolute;
        width:64%;
        height:60%;
        top:20px;
        left:20%;
        z-index:102;
        border:solid 3px gray;
        background-color:White;       
        min-height:500px;
        min-width:600px;

}

---

The problem I am having is that when the web page renders the panel does not appear. However when I resize the browser using the handle in the bottom right hand corner it magically appears.

Does anyone have any idea what is going on ?
I HATE IE 6 !!:confused:

Without further information, try setting position : relative; to the parent element.