I already do this configuration on the s3500
interface-profile lacp-profile BULDING9
group id 9
no interface gigaethernet 0/0/21 #to remove qos profile
interface gigaethernet 0/0/21
lacp-profile BULDING9
no interface gigaethernet 0/0/22
interface gigaethernet 0/0/22
lacp-profile BULDING9
on the otherside s1500
interface-profile lacp-profile BULDING9
group id 1
no interface gigaethernet 0/1/0
interface gigaethernet 0/1/0
lacp-profile BULDING9
no interface gigaethernet 0/1/1
interface gigaethernet 0/1/1
lacp-profile BULDING9
but the connection down.. any advice