error code 1603 (MSN messenger installation)

while installing the new messenger version (and for some
reason, i can't install older versions either now!), error
code 1603 appears.

the event viewer tells me that Produkt: MSN Messenger 6.2
-- Fehler 1325. "(Diverses)" ist kein gültiger kurzer
Dateiname.

(i.e.) "Divers)" is not a valid short file name (i hope
that's correct translation.

also Event ID: 11325(no idea if this is of any use)

Data:

000: 7b 41 42 45 42 38 33 38 {ABEB838
0008: 43 2d 41 31 41 37 2d 34 C-A1A7-4
0010: 43 35 44 2d 42 37 45 31 C5D-B7E1
0018: 2d 38 42 34 33 31 34 36 -8B43146
0020: 30 30 32 30 35 7d 00205} (Bytes)



0000: 4542417b 38333842 31412d43 342d3741
0010: 2d443543 31453742 3442382d 36343133
0020: 30323030 7d35 (Words)


This is all I can tell you...

thanks in advance for your help

G