Border Around my Application Window..Help!!!

I have a border around one of my Internet Based Application window.

The application is PartyPoker downloadable from www.partypoker.com.

The strange thing is the border is around 2 inches and transparent and I can see my desktop through it.

1.My Graphics driver is NVIDIA GEFORCE 2 and it is only with this application that I face a problem.

2. My font size is set to 96 dpi and screen resolution is 1152 X 864 (tried changing it but the same problem persists)

3. Operating System is Windows Me

I want to get this resolved...please help me