Expand/Collapse option in Portal - SP13

Hi everybody!!

We have EP7.0 NetWeaver 2004s and we upgraded the SP from 5 to 13. When SP13 was installed, the icon to expand/collapse doesn't work correctly (Detail Navigation in Navigation Panel in the Light Framework). The icon always send the user to the main and first page. With the SP5 it works well.

Do you have any idea about how can I solve this??

Thanks in advance for any help that you can give me!

Best Regards,

Claudia