Browse button not working in Skill GUI

I'm having issue with Browse button in GUI. It does nothing when I click it. Below is my code:

 ;creation of form

Browse=hiCreateButton( ?name 'browse ?buttonText "Browse" ?callback "SyncBrowser()")

hiCreateAppForm(

?name 'skillGUI

?formTitle "A simple GUI"

?fields

list( list(Library 0:40 600:30 200)

list(Cell 0:70 600:30 200)

list(Cellview 0:100 600:30 200)

list(Run 50:160 100:30 200)

list(ViewOutputFile 200:160 200:30 200)

list(Browse 450:160 100:30 200)

            );list

);hi createAppForm

 procedure(SyncBrowser()

ddsSyncWithForm(

skillGUI()

'Library

'Cell

'Cellview

'Browse

);ddsSyncWithForm

 );Procedure

Any clue where I am going wrong?

 Thanks,

Sandeep