Dual NIC issue with Windows XP

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Hi,

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Was curious if someone could help out on this issue.

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Workstation has dual NIC's, one embedded, one PCI.�  Both are on seperate subnets.�  Machine is Windows XP Professional.

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The PCI NIC, Intel Pro 1000 MT Server Adapter, receives UDP multicast traffic at about 4Mb/s, .5% utilization of adapter, with the machine maxing out at 50% CPU utilization.

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Once this traffic starts coming the other NIC stops working.�  I can ping, tracert, to all resources, but can't connect to them on their port.�  For example: tracing to google.com works, but I can't connect to the website, telnetting on port 80 does not work.�  This is for external and internal resources.�  outlook etc etc.

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Only one gateway is configured and that is on the NIC that points to prod ...