If upgrading from version 1.0 you will have to remove the old version before installing the new version. Follow this procedure for removing it:
•Uninstall the existing Technisoft Field Portal version 1.0.1
•In IIS manager:
oDelete the TSConnect virtual directory
oRemove the Field Portal (or possibly named TSConnect) application pool
oDelete the folder: C:\inetpub\wwwroot\TSConnect
oDelete the folder: C:\Program Files (x86)\Technisoft\TSConnect
•Install 1.1 or 2.X as normal