Tabstrip control in new infotype

I have created a new infotype with a tabstrip control on it. Now whatever I click on I get the message

"Protected tab titles are not supported (tab TABSTRIP title TABSTRIP_TAB1)"

There is no error and everything else is working just fine, it is just that the message is quite annoying. The proposed solution is:

"Check the screen modifications or the Screen Painter definitions of the tab title. When you modify the screen, do not set the INPUT attribute of the tab title to '0'."

However the INPUT attribute is disabled and cannot be changed.

Has anyone experienced any similar problems. All ideas are welcome

Thanks

Martin