Hi,
If you have a maintenance plan, then please open up a support ticket, and the support team can help you.
Else, set the debugloglevel to 5. Refer to this article for more information -->
http://helpnet.flexerasoftware.com/adminstudio2013r2/adminstudio_CSH.htm#ashelplibrary/ASIDETaskDebugLog.htm. Then restart AS, AdminStudioHost process, and attempt to import the app again. When the failure occurs, look at the ISCMIDE.log and AdminStudioHost.log, located under the ConflictSolver sub folder under the AS install location.
Hope this helps.
Thanks!