Minecraft Bukkit Server?

Okay… So i started up a minecraft bukkit server a few months ago. The server is going to be open for anyone to use. Currently me and my friends are building it but i ran into a little problem. Rather big than little but anyways, i had port forwarded, allowed access through the firewall and even set up a domain through no-ip.com. Everything was going just fine with people connecting and everything. Well anyways about a month ago i ended up moving to a new house, new internet, new computer. Obviously that means i have to re set everything up so that's exactly what i did, i redid my ports, allowed access through internet firewall and computer firewall, re changed any settings requiring my ip or ipv4 address, and everything! For some reason only i can connect to the server, no one else can connect at all. I can connect in three different ways, localhost, ipv4 address, or my domain through no-ip. Which would mean i port forwarded correctly. I have watched many youtube videos and even went to portforward.com i'm absolutely positive i port forwarded properly. However if i go to canyouseeme.org and check my port there it says the port isn't open. I'm am entirely unsure of what to do. I have tried everything, watched every video. Read every forum! I can find no solution, please help me! I want to get my server back up and running as soon as possible!