Problem with html:select - Cannot find bean

When I try to put a select box with some option tags, I am getting "Cannot find bean under name CustomerNames" error. I have searched the forum and im not able to solve it.

<html:select name="CustForm" property="selCustName" multiple="true" size="10">
<html

ptions collection="CustomerNames" property="custName" labelProperty="id"/>
</html:select>

I am having a customer form which has a arraylist CustomerNames. This arraylist has customer bean which has proeprties custName and id. The custForm also has a String[] selCustName.

Please let me know what am I doing wrong here.

Thanks

sorry by mistake posted the same question again