DHCP Clients defaulting to wrong VLAN?

Here is the problem. We have a SuperDuperScope with two scopes in it. Both scopes are different VLAN's. VLANX and VLANY. The core Layer 3 switch that they pass through has the helper IP address of the DHCP Server.

When VLANX clients try and obtain a DHCP Address it tries for 10 seconds then times out. After doing so it gets one from the second scope right away on VLANY. Wrong VLAN right, so now the computer is shut down for good until you go in and either reboot with a reservation in DHCP or statically configure the IP Address. This is a major headache for us because it has been happening all over everyday.

Anybody know?

You already have a relay agent - the Cisco 6509 with ip helper-address. But only if it is configured properly.
>IP Helper Config is correct.
I'll have to take your word for it that it looks like this:
  interface vlanX
    ip address xxx.xxx.118.129 255.255.255.128  <== important
    ip helper-address xxx.xxx.198.7

>well isn't 118.126 and 198.0 on two sperate physical subnets
You mean for them to be, but they are in one "super" scope. One scope-one physical subnet.
Also, subnets within a superscope are meant to be continguous as in a summary group. For example:
192.168.198.0 /24
192.168.199.0 / 24
192.168.200.0 / 24

These two can be grouped into one superscope 192.168.118.0/24
192.168.118.0 /25
192.168.118.128 /25

> what I showed above should work Superscope or not
Not.