Discussion Board for collaboration related to QlikView Deployment.
If you have a login to the customer or partner portal, you can look at article 3719:
In short, there are a number of different reasons for this to happen. Here are a few of the more common ones:
Couple of things will cause this. Most of the time it has to do with authentication not being setup correctly. Also, if you application pool is set to 32 bit will cause it also (if you are using IIS)