Are you using IIS or Qlikview Webserver? If you are using IIS try the following:
1- Go to IIS manager
2- Go to Default Web site( or where ever you implement the Qlikview apps folders)
3- Select QvAjaxZfc
4- Open the Authentication
5- Have Anonymous = Enable and Windows Authentication = disable.
6- On the bottom, go to “content view”
7- Find the “authenticate.aspx” and right click on it and select “switch to feature view”
8- On feature view for the Authentication.aspx, select / open Authentication
9- Disable “anonymous authentication” and enable “ Windows Authentication”
10- Verify that under QvAjaxZfc\htc is Anonymous = enable and Windows Authentication = disable.
11- Select QlikView virtual folder
12- Repeat steps 4-10
13- Do a IIS reset and try again with the Ipad.
- Make sure that you have the Offline Services and that you have the attributes in the document "OFFLINE = TRUE"