Crash at Checkout with USPS or UPS

[JimBattle]

I have set up my store with UPS and USPS shipping. However, when either of those shipping methods is turned on, I experience frequent crashes after I hit the "Checkout" button. I also get through sometimes, so I don't think the problem is in my setup. But I sure don't want my customers to experience crashes at checkout 75% of the time.

 

It is the typical crash message:

The page cannot be displayed

The page you are looking for is currently unavailable. The Web site might be experiencing technical

difficulties, or you may need to adjust your browser settings.

 

I'm halfway thinking that either the USPS or UPS server is down or busy when my checkout pings them. But I really can't tell what the cause is - just that it is a significant problem.

 

Any suggestions? Thanks.

 

Jim Battle