How refresh a Dynpro

Hi,

I'm using 2 ALV Grid in a dynpro.

On the top I have a frame with some text fields that I use as header.

When I click on the ALV grid I can update the other one but I can't update the header or better ... the sceen does'n refresh.

I'm tryng using Call Screen and it works but I know that it's not the best solution...

How can I resfresh the dynpro...

Thanks

Salvatore