Framed-pool with freeradius

I want to know if anyone knows how to work with framed-pools defined in the freeradius database.
I’m trying to get a scenario where users authenticate via 802.1x on freeradius and depending on their group they will be assigned with a different address pool defined on mikrotik router.

I’ve tried to insert an attribute named ‘framed-pool’ on RadgroupReply database table with value :=name_of_the_pool (defined on the router). But it doesn’t work!!

Can someone help me with this?

Thanks