Try logging into the router and changing the Mode from th edefault g & b to Auto 108
If you are not sure how to do this login clicking on this link
http://192.168.0.1 A little box will pop-up
the default username/password is admin/sky
Got to the link on the left Wireless Settings and you will see the Mode settings
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Ray
Some Advice.. Its always advisable to inform your old ISP as soon as you have migrated that you have moved.
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If you would like to know the straight line distance to your exchange then
click here
Would you like an idea of the possible speeds you will get with the Max Package then
click here or for the Connect Package then
click here