Try this…
- Run the Client uninstaller utility, download it from here: http://support.openview.hp.com/selfsolve/document/KM1400068
2. Bounce the client (important)
3. Re-register the client
4. Check the version.
5. Try again to import the project.
6. Also try from different machines.
Also review if ther is not a newer version for the Agile accelerator for version HP ALM 11.5.
Cordially