Cant install BE2012 client

Hi everyone,

Im trying to install a client for BE2012 via PUSH but i get the following message:

Job started     : Tuesday, December 18, 2012 1:22:51 PM
Job ended       : Tuesday, December 18, 2012 1:23:09 PM
Final error: 0x643 - Fatal error during installation.

Final error category: Other Errors
Completed status: Failed

Anyone have some idea how can i install the client?

Regards,

Alejandro

PS. A client was installed on this server, and the data i want to backup is mailboxes for exchange