Buttons are not enabled in my faceplate ,I have configured properly but not enabled.any link connection need.
a button in a faceplate is defined in the Buttons tab.
There you define the property to be set when pressing the button. The property itself is defined regarding who is allowed to read and write to the property, maybe your user is not allowed to write ?
Most probably is your problem regarding the Enabled configuration. If the expression sets it to false, you will have a dimmed button.