If you have any problems with the DHCP server (maybe it didn't hand out a gateway address?), try deleting all existing pools and all existing DHCP servers, then run the DHCP Setup Wizard. In fact, this is probably the fastest, easiest way to configure the DHCP server in most all cases.

/ip pool
add name=dhcp_pool1 ranges=192.168.62.65-192.168.62.199

/ip dhcp-server
add address-pool=dhcp_pool1 disabled=no interface=bridge lease-time=1d name="LAN DHCP"
/ip dhcp-server option
add code=66 name=tftp-server value="'http://192.168.61.30:84/'"
add code=160 name=polycom-server value="'http://192.168.61.30:84/'"
add code=2 name=time-offset value=0xffff9d90
/ip dhcp-server network
add address=192.168.62.0/24 dhcp-option=polycom-server,tftp-server,time-offset dns-server=\
    8.8.8.8,8.8.4.4 domain=janzenwahl.local gateway=192.168.62.1 netmask=24 next-server=\
    192.168.61.30 ntp-server=192.168.61.1