InterVLAN routing ProSAFE GS748T with external DHCP

Hello,

I have an Netgear Prosafe GS748Tv5 managed switch, with an Raspberry Pi as DHCP server.

I am using a set of 7 VLAN's but i can not get it to work to acces internet via anny of the VLAN's accept the VLAN where the Raspberry is on (not the default VLAN 1).

my setup:

VLAN 10 with members: p1,p2,p3,p4(all untaged),p39(tagged pi dhcp),p48(untagged internet)

VLAN 20 with members: p5,p6,p7,p8(all untaged),p39(tagged pi dhcp),p48(untagged internet)

VLAN 30 with members: p9,p10,p11,p12(all untaged),p39(tagged pi dhcp),p48(untaged internet)

and so on till VLAN 70 with members: p39(tagged pi dhcp),p40,p41,p42(all untagged),p48(untagged internet).

So port 39 and 48 are common vor all VLAN's

DHCP is working fine, so VLAN's are working and the tagged port is doing it's job.

The VLAN's have an DHCP addres like 192.168.10.0\24 and 192.168.20.0\24 etc..

The ports are programmed in VLAN routing as 192.168.10.125 r1, 192.168.20.125 r2 etc.

The external network (internet) on port 48 has an ip of 192.168.158.1 (gateway) the switch has an ip of 192.168.158.91 (manager interface VLAN1 default).

Routing is disabled, setting the DHCP gateway to the external address doesn't help, setting it to the port ip (xxx.125) doesn't work.

Enabeling routing makes the VLAN can't connect omongst each other.

i've tryed to add a default route and a static route, but i get messages like:

"the specified static route next hop address can't be in the same subnet as the service/network port"

"The specified static route address is invalid"

"The route will not take effect until a routing interface belonging to the same subnet as the next hop ip is created and activated"

can somebody help me with this mess?