Hierarchy Authorization Variable became optional while migrating to BI7

Dear All,

Recently, we have migrated my BW 3.5 system to BI 7 environment but using 3.5 functionality there.

Our Hierarchy Authorization Variable based reports were working fine in 3.5, here variable field were mandatory and protected (GRAY field with drop-down facility) but now while executing this in BI7 with 3.x reporting, this became free text enterable field (drop-down also there).

Help me how to make it mandatory & protected?

Regards,

Sunil Sinha