Is Norton blocking me from posting ads on Craigslist?

I uploaded the Norton program that comes with my Comcast account -Norton Security Suite, and since been having problems with my Craigslist account

 

I did try uninstalling Norton temporarily, but this did not help.

 

The problems I am having are -

 

 1. When I first try to post an ad,  upload 4 pix, I can get as far as the very last "continue" before it fails and goes to "the website is unavailable " screen.

 

2. I can no longer open the "manage" links on older ads/posts either.

 

I have not received any notice/warnings/blocks/ and/or flags from CL

 

I also have tryed logging off CL and logging back in. 

 

I did not have any problems with CL  while using Kapersky, however, my subscription expired and I saw no point in paying to renew , when I was already paying Comcast which includes Norton.

 

Any help would be greatly appreciated. CM