IE firewall error in vista while loading contributor

[Hitman]

While trying to load contributor iam getting an error
'Firewall security error  -918,-921,-907' in Vista

Does anyone know how to solve this error?

[ykud]

Contributor Client? Cotributor Admin Console?

[Hitman]

We installed and configured the CAC after that where trying to access an contributor application,during which the Internet Explorer throwed this error. ::)

[ykud]

Make sure that firewall doesn't block dispatcher ports. You can see them in Cognos Configuration.