Remote Desktop via VPN (Check Point SSL Network Extender)

Greetings all,
I have be trying to remote desktop into my work computer from home. I am
using Vista Ultimate at home and XP Pro at work. My company has me using
Check Point SSL Network Extender software to VPN to my company network. When
I VPN with Check Point SSL Network Extender it opens the connection, but when
I try to remote desktop it will not remote connect. I have another computer
at home with XP Pro and it works just fine when connecting in to my work
computer. Is there something differant between when remote desktopping Vista
to XP and XP to XP? Is there some settings I am over looking to get Vista to
remote desktop my XP PRO machine via Check Point SSL Network Extender over
the internet? Please inform me what I should do to make this work.

Thanks,
Gregg