I tried to make a demoman werable (like boots) that regenerates hp but it never does. Can anyone help?

"Ultra baboon"
{
"classes"
{
"demoman" "0"
}
"baseclass" "wearable"
"baseindex" "405"
"nobots" "1"
"quality" "6"
"logname" "hart_ultra"
"description" "Regenerates 4 hp per second"
"attributes"
{
"health regen"
{
"plugin" "tf2attrib"
"value" "4"
}
}