[ic] buy now and buy list

[interchange-users@interchange.redhat.com]

i'm trying to add the buy now and buy list buttons to an existing website 
with a drop down box. I have been able to get the drop down box and price 
differences to work, but when I add a second item to the same page it stops 
working properly, adding one of each item to the cart and disabling the price 
selection option. this is what I have
<INPUT TYPE="hidden" NAME="mv_order_item" VALUE="400112">

<SELECT NAME="mv_sku0"><OPTION VALUE="400112-39.95">$39.95 Each<OPTION 
VALUE="400112-214.99">$214.99 Case of 6</SELECT>
<INPUT TYPE="text" name="mv_order_quantity" VALUE="" SIZE="3">
<input type="image" 
src="http://www.airdelights.net/foundation/images/foundation/buynow.gif" 
border="0" value="Buy it Now!" name="I3" width="52" height="13"> 
<INPUT TYPE="hidden" NAME="mv_order_item" VALUE="400979">

<SELECT NAME="mv_sku0"><OPTION VALUE="400979-59.95">$59.95 Each<OPTION 
VALUE="400979-319.99">$319.99 Case of 6</SELECT>
<INPUT TYPE="text" name="mv_order_quantity" VALUE="" SIZE="3">
<input type="image" 
src="http://www.airdelights.net/foundation/images/foundation/buynow.gif" 
border="0" value="Buy it Now!" name="I4" width="52" height="13"> 

<INPUT TYPE="submit" VALUE="Buy List">