I am trying to enable PVST+ on our Black Diamond switch. 
When I try to enable certain STP instances, I get an error:
Ops_BD8810.2 # configure stpd AB-Level2 tag 2602  Ops_BD8810.3 # enable stpd AB-Level2  Error: Incorrect carrier vlan configuration of port 4:41 in stp domain AB-Level2  Configuration failed on backup MSM, command execution aborted!  I am not sure why this happens, seems to not have a problem with port 2:9:
Ops_BD8810.9 # sh ports 4:41 info dePort:   4:41
        Virtual-router: VR-Default
        Type:           UTP
        Random Early drop:      Unsupported
        Admin state:    Enabled with  auto-speed sensing  auto-duplex
        Link State:     Ready
        Link Counter: Up        0 time(s)
        VLAN cfg: 
                 Name: AB-Level2, Internal Tag = 2602, MAC-limit = No-limit, Virtual router: VR-Default
        STP cfg:
                AB-Level2(disable), Tag=2602, Mode=PVST+, State=DISABLED--------------------------------------------------------------------------  Ops_BD8810.10 # sh stp "AB-Level2" Stpd: AB-Level2         Stp: DISABLED           Number of Ports: 3
Rapid Root Failover: Disabled
Operational Mode: 802.1W                        Default Binding Mode: PVST+
802.1Q Tag: 2602
Ports: 2:9*,4:41,10:10
Participating Vlans: AB-Level2
Auto-bind Vlans: (none)
Bridge Priority: 32768
BridgeID:               80:00:00:04:96:1e:23:50
Designated root:        00:00:00:00:00:00:00:00
RootPathCost: 0         Root Port: ----
MaxAge: 0s              HelloTime: 0s           ForwardDelay: 0s
CfgBrMaxAge: 20s        CfgBrHelloTime: 2s      CfgBrForwardDelay: 15s
Topology Change Time: 35s                       Hold time: 1s
Topology Change Detected: FALSE                 Topology Change: FALSE
Number of Topology Changes: 0
Time Since Last Topology Change: 0s