risolto così:
codice:
Set f=fs.OpenTextFile(Server.MapPath(filetxt),1,1,-1)
OpenTextFile(filename, iomode, create, format) returns an instance of the TextStream object corresponding to filename. iomode specifies whether the file should be opened for reading (1), for writing (2). or for appending (8). create indicates whether to create the file if it does not already exist. If format is -1, it opens the file as Unicode. If it is 0, it opens it as ASCII. If format is -2, the file is opened according to the system default.