Modify default URL of Webdynpro

Hello Friends,

the following scenario:

At the moment i get the "FQDN" error when trying to run a webdynpro app. At the same time, if I try to access the "Layout" tab of a View to design the application frontend I get the "This program cannot display the webpage" error.

the default URL generated by webdynpro is http://hostname:port/sap/...

To be able to enter "Layout" mode and to run application in browser the correct URL must be http://hostname.domain.extension:port/sap...

How can i change the default generated URL to concatenate the missing "domain.extension" in the hostname?

Thanks in advance.