Symphony-CD does not search the FM band

Hi fellows;

I have an OCTAVIA 2001 equipped with Symphony-CD audio system.

When I try to search through the FM band using the ">>" key, the audio system does not search the frequencies one after the other, it quickly jumps to specific channels (something like the Intelligent Search feature that comes in some FABIA audio systems).

This was not the case before since the audio system used to search the FM band (not jumps in it).

I don't have the same problem when searching the AM band.

Do any of you know how to solve this problem.

Thanks.