Why doesn't Esnipe work with my ebay.

[bmacquad]

I've lost 2 auctions in the last week because when esnipe tried to enter my bid there were "security" issues.

My esnipe bids were way higher than the "winning bids".

What really confuses me is that I also successfully won

an item through esnipe in between these two incidents.  

Here are the esnipe e-mail I received:

As requested, eSnipe's Rovatron bidding agent connected to eBay 6 seconds before auction end to place your bid.

eSnipe encountered an eBay security message while trying to place this bid. Login to your eBay account to resolve the problem.

These results are for this eBay item:

I use Firefox as my browser in all 3 cases.

It's very disappointing to lose to a much lower bid!

What is going on?