As HTML5 for dashboard comes with SP5 only however you are on SP4
SAP BusinessObjects BI 4.0 SP4, version 14.0.4.738
There are some important technical prerequisites for being able to view mobile dashboards on iPad :
1. SAP Business Intelligence 4.0 SP05
2. SAP Dashboard Design SP05.
The SP05 version includes the new mobile panel, compatibility checks and publish to mobile modes.
3. The iOS app SAP BusinessObjects Mobile for iOS version 4.4 and above.
Thanks,
Sapanesh