multi vlan subnet, wrong netmask and wrong router offer in PXE

[nono monbou]

Hello
I have a problem on pxe boot on one of my vlan.
Dhcp offers the wrong netmask and the wrong router ip.
Dhcp offer the netmask and the router ip  of the first declarated subnet in the dhcpd.conf.
I join my dhcpd.conf

For example
A machine of the vlan 10 (subnet 149.55.10.0/24) obtain 148.55.10.180 ip address but 255.255.248 netmask and 149.55.7.254 router ip.

Could you help me ?
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