VS 2008 help filling out an HTML form

I'm trying to fill out the username and password form on the website: https://secure.myhfs.illinois.gov/lo...oamingEPF.html

the user name and password html is :

Code:

<td><input type="text" name="username" size="30">

                            <!-- Load the username of the last user into the input field -->

                            <script>

                                if (apiAccess.entrustTruePassClientAPI.entrustTruePassGetLastUserProfileType()=="ROAMING_EPF") {

                                    document.entrustform.username.value = apiAccess.entrustTruePassClientAPI.entrustTruePassGetLastUser();

                                }

                            </script>

                        </td>

                    </tr>

                    <tr>

                        <td><b>Password:</b></td>

                        <!-- AUTOCOMPLETE = "off" will turn off the password autocomplete option-->

                        <td><input type="password" name="password" AUTOCOMPLETE="off" value="" size="30"></td>

When I try to set the username and password after the website has finished loading through my IE object I get Object variable or With block variable not set. How can I set the username and password of these input fields?

Code:

IE.document.getelementbyid("password").value = idpa2_pw

IE.document.getelementbyid("username").value = idpa2_user

Yet when I try to set the value of either the "password" field or the "username" field