[Qgis-user] build virtual raster

[marcozanieri at geosweb.it]

hi, i want to report an error in tool gdal using "build
virtual raster", when i try to use this tool appears the
error:
Traceback (most recent call last):
  File "C:\Documents and
Settings\marco\.qgis\python\plugins\GdalTools\tools\dialogBase.py"
, line 85, in processError
    msg = QString.tr("The process failed to start. Either
the invoked program is missing, or you may have insufficient
permissions to invoke the program.")
AttributeError: type object 'QString' has no attribute 'tr'

The S.O. is winxp.
marco zanieri