how i can select data from a combo box and fires onchange command using VBA-excel - excel

Question

i want to select "56 - Hoyer (Suk / Rontec)" in the combo box and then fire the event that reloads the page using VBA excel, i can put the text on the combo box, but it doesnt load tha javascript attached to it (onchange event).
see image of the drop down / combo box here
below is the code i use in VBA to fill out the combobox with a constant value. but i cannot run the onchange event on html provided.
Call IE.document.getElementById("orders.carrier_number_txtSelectionDisplay").setAttribute("value", "56 - Hoyer (Suk / Rontec)")
Call IE.document.getElementById("orders.carrier_number_txtSelectionDisplay").setAttribute("value", "56 - Hoyer (Suk / Rontec)")
Set x = IE.document.getElementById(orders.carrier_number_txtSelectedValue)
x.Focus
x.FireEvent "onchange"
Below is the HTML code:
<td>
<div>
<span id="Descriptor.orders.carrier_number" class="dataentry-descriptor dataentry-descriptor-top" style="text-align:left;">Carrier</span>
</div>
<div class="dataentry-field-control" style="text-align:left;">
<div id="orders.carrier_number_4b7bc829-2760-4042-aab0-be8ccfb9541b" timerid="" querymethodname="GetSupplierCarriers">
<div id="orders.carrier_number_pnlSelectionDisplay" class="ffnet-combo-box dataentry-field required" style="width:180px;">
<table border="0" style="border-spacing: 0px; border-collapse: collapse; margin:0px;">
<colgroup>
<col style="width: 100%">
<col style="width: 30px; text-align: right;">
</colgroup>
<tbody>
<tr>
<td style="padding: 0px;">
<input name="orders.carrier_number$txtSelectionDisplay" type="text" id="orders.carrier_number_txtSelectionDisplay" class="dataentry-field required validate[required] required" isrequired="True" datatype="3"
onkeydown="javascript:return InputProcessKeyDown('orders.carrier_number_4b7bc829-2760-4042-aab0-be8ccfb9541b', event);" onfocus="javascript:return InputProcessOnFocus('orders.carrier_number_4b7bc829-2760-4042-aab0-be8ccfb9541b');
" style="width:150px;">
<input name="orders.carrier_number$txtSelectedValue" type="text" onchange="retrieveChildData("orders.carrier_number_4b7bc829-2760-4042-aab0-be8ccfb9541b","orders.loaded_driver_number_e5ba36ca-
aa0f-4f55-aa3e-c7cb342d0b0b"); retrieveChildData("orders.carrier_number_4b7bc829-2760-4042-aab0-be8ccfb9541b","orders.delivered_driver_number_e7747c68-df71-4774-9b04-
d897d1fd9833"); retrieveChildData("orders.carrier_number_4b7bc829-2760-4042-aab0-be8ccfb9541b","orders.vehicle_code_d3cc805c-e505-45c5-a351-98028439e34d"); retrieveChildData("orders.carrier_number_4b7bc829-
2760-4042-aab0-be8ccfb9541b","orders.tractor_number_089faa52-6810-4815-8f64-81eb201105a2"); UpdateDirtyBit(1);setTimeout('__doPostBack(\'orders.carrier_number$txtSelectedValue\',\'\')', 0)"
onkeypress="if (WebForm_TextBoxKeyHandler(event) == false) return false;" id="orders.carrier_number_txtSelectedValue" datavaluefield="carrier_number" assembly="FFNET_CORE" funcname="OrderDispatch_DeleteOrderTrailer"
methodclass="CBL" hasautopostback="true" namespace="FBS" selectlistargs="{"SenderId":"orders.carrier_number","supplier_number":"139","RequiresParent":"True"}" style="display:none;">
</td>
<td>
<img id="orders.carrier_number_imgArrow" onclick="InputProcessOnFocus('orders.carrier_number_4b7bc829-2760-4042-aab0-be8ccfb9541b'); activeCB.toggleDropDown();" src="/ffnet/Images/DropDownListArrow.gif">
</td>
</tr>
</tbody>
</table>
</div>
<div id="orders.carrier_number_pnlDropDownList" class="ffnet-combo-box-ddlist" style="width:339px;">
<div id="orders.carrier_number_pnlDropDownRegion" class="ffnet-combo-box-ddregion" value="" style="width:339px;">
<table header="0" style="width:322px;" cellspacing="0" cellpadding="0">
<colgroup>
<col style="width:80px;">
<col style="width:210px;">
</colgroup>
<tbody>
<tr>
<th>Carrier Number</th>
<th>Name</th>
</tr>
</tbody>
</table>
<div id="orders.carrier_number_pnlDataRegion" class="ffnet-combo-box-data" style="width:339px;height:200px;">
<table style="width:322px;" onkeydown="javascript:return ProcessKeyDown(this, event);" tabindex="0" mode="combobox">
<colgroup>
<col style="width:80px;">
<col style="width:210px;">
</colgroup>
<tbody>
<tr id="orders.carrier_number_tr0" pk="1" text="1 - Armac Shipping" class="ffnet-combo-box-row-focus">
<td>1</td>
<td>Armac Shipping</td>
</tr>
<tr id="orders.carrier_number_tr1" pk="2" text="2 - IPCS Ltd">
<td>2</td>
<td>IPCS Ltd</td>
</tr>
<tr id="orders.carrier_number_tr23" pk="56" text="56 - Hoyer (Suk / Rontec)">
<td>56</td>
<td>Hoyer (Suk / Rontec)</td>
</tr>
</tbody>
</table>
</div>
<div id="orders.carrier_number_pnlPager" class="ffnet-combo-box-paging" title="Click for more records" onclick="RetrieveNextPage($("[id$='orders.carrier_number_4b7bc829-2760-4042-aab0-be8ccfb9541b']").get(0), false);
" recordcount="129">
1-30 of 129 results
</div>
</div>
</div>
</div>
<input type="hidden" name="orders.carrier_number_txtSelectedValue_hdnDirtyBit" id="orders.carrier_number_txtSelectedValue_hdnDirtyBit" value="0">
</div>