When you save a new report, the system saves it as a personal report. No other user can view a personal report (even as a report dashpart). In order for others to see the report, you have to change it to a global report using Access Control.
To share a report with other users:
In the Navigation menu, click Reports ยป <Report Category>.
On the Reports tab, select the report for which you want to change access control.
Click Access Control.
On the Access Control dialog box, define the users/groups to whom you want to give access. You can further define if the user/group will have read only or full access.
Click Save.
On the Reports tab grid, the report Type changes to Global.
Modify options for a standard report
Save a modified standard report as a new report