Printing from windows to CUPS server with HP Photosmart C3100 series driver

Hello,
I have linux (ubuntu) box with HP Photosmart C3100 and CUPS server. I
tried printing from MS windows (Media Center Edition - it's like XP, I
guess) via IPP (http://host/printers/printer). But it didn't work with
"generic - MS Imagesetter" nor with "HP - HP photosmart 3100".
Moreover, "add printer" dialog froze after selecting driver. In cups'
error_log I could see these messages (debug level) repeating every 2
seconds:

D [18/Oct/2007:20:40:37 +0200] cupsdReadClient: 7 POST
/printers/HPc3100 HTTP/1.1
D [18/Oct/2007:20:40:37 +0200] cupsdAuthorize: No authentication data provided.
D [18/Oct/2007:20:40:37 +0200] Get-Printer-Attributes
http://minerva:631/printers/HPc3100
D [18/Oct/2007:20:40:37 +0200] cupsdProcessIPPRequest: 7 status_code=0
(successful-ok)

after stopping "Print spooler" in windows, "add printer" dialog
unfroze and I could go on with adding printer.

Printing from another cups client to this cups server (same printer)
works fine, printing from same windows client to another printer on
same cups server works fine as well! That's why I think it's a problem
in hplip.

distro: ubuntu gutsy gibbon (beta)
printer: HP Photosmart C3110
Printer Driver: HP PhotoSmart C3100 Foomatic/hpijs (recommended)
Device URI: hp:/usb/Photosmart_C3100_series?serial=CN6C6C52Q304P9
But I found similar problems with different photosmart printers, when