I have narrowed it down to be a security related problem.
The CuteSoft_Client files are placed inside "/admin/CuteSoft_Client/" folder.
Inside "/admin" I have a web.config file with:
<
configuration><system.web><authorization><denyusers="?"/></authorization></system.web><
locationpath="CuteSoft_Client"allowOverride="false"><system.web><authorization><allowusers="?"/></authorization></system.web></location></
configuration>
When I moved the CuteSoft_Client files to my application Root, everything was OK.
I'll look closer at my security settings.
Regards, Zapotec