Hi
you have to change also transmission part in XML, putting a valid username and password, later on check if GLOGXML element is one of the permitted in INTEGRATION GUIDE. if U post xml used for import I could check.
<Transmission>
<TransmissionHeader>
<UserName>TEST.TEST</UserName>
<Password>Passs...</Password>
</TransmissionHeader>
<TransmissionBody>
<GLogXMLElement>......
Regards.