DHCP Issue

[northgoose]

Hello, I have a small network of 5-6 machines, win2003 file server and naked dsl speedstream router. I recently had to change ISP, unfortunately they don't have good technical support. I currently have internet but the clients leases are not being automatically renewed. I am aware that DHCP is down but can't get it working. I can rectify the client ips by rebooting the router every 3 days or so.
My old TCP binding on the server was IP 192.168.2.2
Sub 255.255.255.0
Default Gateway 192.168.2.1
DNS 192.168.2.2
The new ISP has given me these details but I am not sure how to proceed.
Subnet 64.235.209.64/29 I'm really curious about the 29
IPs 64.235.209.65 thru 71
Mask 255.255.255.248

Any help in implementing would be appreciated.
Thanks