Diagnosis
The fax number you specified to be used &V1& is not in canonicalformat. The fax number check is switched on.

System Response
The configuration was not adopted.

Procedure
You can adapt the number to simple canonical format:
Permitted characters: 0123456789() and space
Format a) '(Dialing code) number', e.g. '(06227) 344348'
Format b) 'Number', e.g. '4348'
Format c) Not filled
Alternatively, you can switch off the fax number check in SAPconnectAdministration.