Can't remove vlan 1 from access port on PowerConnect 2716; want to associate port with vlan 2

We have a 2716 that I need to create some access ports with VLAN 2. I cannot deselect VLAN 1 from these ports in the VLAN Membership settings, but I can add VLAN 2 to these ports, so both VLANs 1 and 2 are untagged for these ports. I know this won't work, and I thought this might be an IE issue, so I downgraded IE from 11 to 10, which didn't work, and I tried Chrome with the same results. Does anyone have an idea of what I might try? Thanks