Port-Channel Issue: SP-5-CANNOT_BUNDLE_LACP

Question

I'm having an issue with the port-channel coming up. Right now it's "down down". I'm not really sure why. All other port-channels on the 6500's in VSS work fine. This one seems to be giving me an issue though.
-Both interfaces that are using this port-channel are "up up".
-I've done "shut's, no shut's" on all interfaces involved.
sh etherchannel summary
Flags:  D - down        P - bundled in port-channel
        I - stand-alone s - suspended
        H - Hot-standby (LACP only)
        R - Layer3      S - Layer2
        U - in use      N - not in use, no aggregation
        f - failed to allocate aggregator
        M - not in use, no aggregation due to minimum links not met
        m - not in use, port not aggregated due to minimum links not met
        u - unsuitable for bundling
        d - default port
Po4(SD)         LACP      Gi1/1/4(I)     Gi2/1/4(I)  
interface Port-channel4
switchport
switchport access vlan (vlan number)
switchport mode access
load-interval 30
flowcontrol receive desired
spanning-tree portfast edge
end
interface GigabitEthernet1/1/4
switchport
switchport access vlan   (vlan number)
switchport mode access
load-interval 30
flowcontrol receive desired
spanning-tree portfast edge
channel-protocol lacp
channel-group 4 mode active
end
interface GigabitEthernet2/1/4
switchport
switchport access vlan  (vlan number)
switchport mode access
load-interval 30
flowcontrol receive desired
spanning-tree portfast edge
channel-protocol lacp
channel-group 4 mode active
end
sh log
149886: Jul  3 15:20:34 CDT: %EC-SW1_SP-5-CANNOT_BUNDLE_LACP: Gi2/1/4 is not compatible with aggregators in channel 4 and cannot attach to them (flow control receive of Gi2/1/4 is desired, Gi1/1/4 is on)
149887: Jul  3 15:20:35 CDT: %EC-SW2_SPSTBY-5-CANNOT_BUNDLE_LACP: Gi2/1/4 is not compatible with aggregators in channel 4 and cannot attach to them (flow control receive of Gi2/1/4 is desired, Gi1/1/4 is on)
Thank you for your help.

Answer 1

HI Mark,
1. Can you please check your ethernet card ...where this port channel connected..on the server.
    may be there are 2 different card.
2. from cisco websites:
Error Message
Explanation
This port has different port attributes than other ports within the port channel.
Recommended Action
Match the port attributes to that of the port channel.
Regards
Please rate if it helps.
Match the port attributes to that of the port channel.This port has different port attributes than other ports within the port channel.
EC-5-CANNOT_BUNDLE_LACP: [char] is not compatible with aggregators in
channel [dec] and cannot attach to them ([char])