win98SE using source port 137 for DNS queries

I for the past few days I have been unable to get a DNS
response from my isp using win98. My win2k system works
fine. I noticed that the source port used by win98 for
DNS queries is 137, while win2k uses the more standard
>1023 ports. I suspect the source port 137 is causing
problems with the ISP's firewalls. How can I tell win98
to use a normal ephemeral port for DNS queries???

Thanks,
Daniel
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