Front brake issue

[Miklo]

good morning all,
I changed my brakes, front and rear, last week. After doing so, when using the front brake I get and extreamly loud squeal. Its not a squeal you get from when your brakes get low on pad, its loud hurt your ears loud. The brakes work fine at high speeds, but when I get to 15mph or lower they turn into the banshe. Any ideas what would cause this? thanks.