I could really use some help here :-)

I have/might have a problem with the loading times of my landers.
At least thats what it looks like when I test my landers on pingdomtools.
When I try to open on of the landers it works perfectly fine but when I run it through Pingdomtools it gives red errors at the images.
I have asked the Cachefly support and they say has probably something to do with pingdomtools but i havent heard anyone else about it.
I’ve tested the landers on Cachefly and on Amazon cloudfront and I have no clue what could be wrong with it.
The landers themselves are sized between 140 and 300 kB but the loading time stops at 60sec. :-)
Is it just Pindomtools or what could i have done to f*ck up the pages?
Check the error below:

Any tips on this guys?
Sounds like Pingdom is being weird. Have you asked a friend to load the landers on their pc or phone ? That's what I usually do if I'm getting weird errors from a page and want to check it's not just me.