File Matching Expression

I installed a trial of CTA V.10. Running the policy 'mtime> 1 week' is working fine. Doing the same with a policy like 'filename = "*xls*"' doesn't archive anything.

Nov 14 09:26:09 (140673305270080) (INFO)  Starting 80 policy evaluator threads

Nov 14 09:26:09 (140673305270080) (INFO)  Env Var: CIFS_RECONNECT_INTERVAL_MS=3000

Nov 14 09:26:09 (140673305270080) (INFO)  Env Var: CIFS_SEND_AND_WAIT_TIMEOUT_MS=60000

Nov 14 09:26:15 (140673001551616) (INFO)  Normal termination, all action threads completed, will exit

Nov 14 09:26:16 (140673305270080) (INFO)  All walker threads completed, rfwalker progress report follows:

Nov 14 09:26:16 (140673305270080) (INFO)      tag_id = "15004"

Nov 14 09:26:16 (140673305270080) (INFO)      total_dirs_processed = "292"

Nov 14 09:26:16 (140673305270080) (INFO)      last_dir_processed = "\share1\8384\Recent"

Nov 14 09:26:16 (140673305270080) (INFO)      last_file_processed = "\share1\8384\Recent\Zukunft Ölumschlag Landquart.lnk"

Nov 14 09:26:16 (140673305270080) (INFO)      total_files_processed = "2045"

Nov 14 09:26:16 (140673305270080) (INFO)      total_files_archived = "0"

Nov 14 09:26:16 (140673305270080) (INFO)      total_bytes_archived = "0 (0.00 Kbytes)"

Nov 14 09:26:16 (140673305270080) (INFO)      total_fileops_failed = "0"

How can I create a policy that is archiving a given type of files?

Thanks for your help

Andre