Query not drill down

Hi

We have a queres primary sales,stock statement reports etc...... on 0ic_c03 cube ( we have some free chars in these queries ) when i dril down freechars like(family,brand,segment,plant,.....) its take some chars are not dril doened

Where i have done mistake wht are the performence issue

Urgent plz

points awarded

Regards,

Ogeti