functioning Brother printer does not print in Ubunut Linux 10.11

[sk at skaiser.at]

Hello all,
I have a problem with cups and/or Ubuntu Linux :
After an Update of Linux my printer does not print any more  - there are no error messages, the print jobs are registered as completed, but the printer ( which works in window, - I can do a dual boot, perfectly - so the error can only be in cups, the driver or Ubuntu.
I have turned on the level debug in cups, but there are only messages D,
and a message "dirty files", Can anybody tell me where to look, what to do ?

Thanks
           Siegfried
D [22/Dec/2011:17:29:18 +0100] cupsdAuthorize: No authentication data provided.
D [22/Dec/2011:17:29:18 +0100] cupsdSetBusyState: newbusy="Dirty files", busy="Active clients and dirty files"
D [22/Dec/2011:17:29:18 +0100] cupsdAcceptClient: 16 from localhost:631 (IPv4)
D [22/Dec/2011:17:29:18 +0100] cupsdReadClient: 14 GET /images/sel.gif HTTP/1.1
D [22/Dec/2011:17:29:18 +0100] cupsdSetBusyState: newbusy="Active clients and dirty files", busy="Dirty files"
D [22/Dec/2011:17:29:18 +0100] cupsdAuthorize: No authentication data provided.
D [22/Dec/2011:17:29:18 +0100] cupsdSetBusyState: newbusy="Dirty files", busy="Active clients and dirty files"
D [22/Dec/2011:17:29:23 +0100] cupsdReadClient: 16 WAITING Closing on EOF
D [22/Dec/2011:17:29:23 +0100] cupsdCloseClient: 16
D [22/Dec/2011:17:29:23 +0100] cupsdSetBusyState: newbusy="Dirty files", busy="Dirty files"