FI's uplink ports Error Disabled on ENM loop

Hi,
I have two UCS6120XP FIs connected to a Cat2948G-GE-TX switch via port 1/3 on each FI. One port on the Cat2948G-GE-TX acts as the uplink port and is connected to the LAN. All ports of the Cat2948G-GE-TX are in VLAN 1 to allow all connected devices to reach the Gateway via the LAN uplink port.
Now after a while both ports 1/3 on the FIs get error disabled on ENM loop.
'show cdp neighbor' on the Cat2k shows FIs hanging off of 2/45 & 2/46. The management ports of both FIs are connected to ports 2/1 and 2/2 of the
Cat2948G-GE-TX as well, as are some other devices.
I'd like to keep both FI uplink ports enabled for failover scenarios - how can I achieve that w/o the ports getting error-disabled?
Thanks,
Matthias

Hi,
The reload was to test the loss of a FI prior to going into the production environment. A disassociate/reassociate of a SP made no difference.
I plan to upgrade to V2.2(1D) and re-test again tomorrow.

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