I thought that may have been the issue YankeeJim ,But i just don't understand why every other site works fine that time of night is only here?
Those other site probably don't have the quantity of downloads necessary to play or view whatever's there. I'm sure you don't have problems getting to WGT, just after you get there. This is because of what they have to send to you so you can play and that's where the amount of local traffic gets in the way.
If you haven't already, go to your Game Settings and under the Advanced tab, allow Background Loading. This may help if you have it turned off.