Can't locate object method

[mstich at fusionsoftware.net (Mark Stich)]

Win32 Cygwin Install
IIS5x_SSL_PCT Exploit
Win32_BIND Payload
Target 5

I've assigned an RHOST as well, but I keep getting the error message saying:

msf iis5x_ssl_pct(win32_bind) > exploit
[*] Starting Bind Handler.
[*] Attempting to exploit target Windows XP SP1
Can't locate object method "new" via package "Msf::Socket" at
/home/framework-2.
2/exploits/iis5x_ssl_pct.pm line 82.
[*] Exiting Bind Handler.

Does this happen because the target machine is a WinXP SP2 machine?  Or
should it get through this part even if it was a WinXP SP2 machine?

Thanks for any help in advance...