Since yesterday snipes are not executing. Sunday the sniper was working well but starting Monday it is missing 100% of snips. I set to bid at 4 seconds and it never misses.

You did not provide any relevant information so I can't check.
But is it possible you did not link your eBay account yet? Please check the following forum thread for more information:
https://www.myibidder.com/forums/viewtopic/8053/important-changes-to-your-account/

I believe that will solve my issue. I was not aware of the change and also I apologize for not being more specific I just didn't want to give TMI on a public forum. Thank you very much.

That's not problem. This is why I provided the most common cause which should cover it.
Let me know if any issues.

It seems to still not be working although I did make an account and linked my ebay account. I am using the standalone sniper tool that I purchased from ebay ages ago. Is this tool still supported? Or can I only execute snips from my online web application in the account I just created?

I forgot to mention I have version 1.1.4 build 551. I did check for update and it said there was none available.

Why do you think it's still not working? Can you please provide the most recent item number or the status of the snipe?

I used the support link to message account details from my ibidder account and ebay account name. I didn't want to put that on the public forum.