BRIDGE-MIB NOT IMPLIMENTED AND LAYER 2 VLAN TRAFFIC

Hello everybody,

this is my second time query i m trying use switchport mapper tool on newly install cisco 2960TT switches and it gives me error saying bridge-mib is not implimented , however i am able to discover the switche and all the port and can able to see the traffic ,

so then when i try the switchport mapper tool of the utility OPUTIL it works fine and i m able to get details port mapping what is the prob. i have seen in switch there is not configuration changes..

and this only happen on newly configured switches on my other switch swithport mapper of OPMANAGER works fine plz help me..

MY OTHER QUESTION IS THAT how can i see Layer 2 vlan trafic wheni discover switch it discovers layer 3 vlan interface but if i want to see layer2 vlan trafin not port by port i want for example in vlan 200 i have 3 ports i want to see sum of all the tx rx traffic if u can help me on it..

thanks in adv,