keymapping

Dear all,

I have an application which uses ncurses.
In this I use function keys from F-1 to F-20.

If I launch the application in a screen session the function keys are not 
working. Then i created a dedicated terminfo file which I use when calling 
screen.
screen -a -T screen.customFile
this solved the problem locally, however when I connect remotely I have again 
keymapping problems. So I tried to create a new terminfo file 
screen.customFile2 and it also work remotely.

Now the problem is the following:

When I attach (-x) remotely to a session started locally it does not work. It 
looks like the -T option can not be used when attaching to a running session.

Do you have any suggestion advices?

Many thanks in advance for your help