[Cooker] internet slows to zero

[Mike]

Hi team,
I loaded 7.2 rc1 tonight configured it to go on the net configured internet sharing 
and it 
worked a treat for about 3 minutes then slowed to a halt.  Can someone tell me how to 
fix it.  ie which files I need to edit so it keeps on running?  The win box also ran 
fine 
then slowed to a halt.  The mand 7.1 internet connection used to run fine
cheers,
Mike