Secure Lockdown is blocking Skype

Hi I have bought and installed Inteset Secure Lockdown v2 - Multi Application Edition, I want to run a kiosk that has access to one website and the facility to make a skype call.
I have made all the internet explorer restrictions and set an allowed website list. I have then added IE and Skype to the docking disc.
The website links work OK but when I try to open Skype it crashes saying the Skype home is not available at the moment.
If I disable the software and try the link from the dock everything works OK but when I enable the lockdown Skype crashes again.
Is there a setting I am missing that will allow Skype to run?
Cheers

If you disable the Secure Lockdown "Allowed Sites" feature, does it work?

Yes, the problem definately lies somewhere in that area, if I disable it Skype works again.

Then you need to find the URL that Skype is referencing/calling that is being blocked (that is not in the Allowed Sites list). If possible, you may want to try Chrome instead of IE as it is more liberal regarding white listing. You will not have to track down every referenced URL with Chrome.