After navigating to the page you have to check if it's the Search form or result form. If it's later, click New Search button

Thisform.oiweb.Navigate("https://www.labcorp.com/wps/portal/insurer/findalab")
...

IF ISNULL(Thisform.oiweb.Document.getElementById("city")) 
  * Click New Search button
ENDIF

>
>I have just emailed you the form and explained my problem in the email.
>
>Please rename the forms extensions. It looks like gmail does not like .SCX file extensions.
>
>Thank you for all your help.