problem of entering text in combobox created by using <sx:autocompleter>

Question

im trying to use autocompleter tag for displaying autosugget in my application,but with the following code i am not able to write in the combo box but has a populated list which is displayed when down arrow image(along with the combo box) is pressed.

<sx:autocompleter list="state" name="StateName"  list="{'CA','TR','GP','CL'}"  searchType="substring" cssStyle="width:100%" loadOnTextChange="true"  loadMinimumCount="1" autoComplete="true"/>