As Lonk says it is mentionened in the maual in known problems for win 9x:

Code:

HKEY_LOCAL_MACHINE
   System
      CurrentControlSet
         Services
           MSNP32
              Network Provider CallOrder   [00 00 00 40]  >change to>  [00 00 00 20]
           NOVELLNP
               Network Provider CallOrder  [00 00 00 20]  >change to>  [00 00 00 40]


You could give it a try

-Erik