[RESOLVED] EnumPorts error

I did a search and couldn't find any help. I am calling EnumPorts to get a list of network printers installed on the computer. When I call EnumPorts the first time (to find the buffer size) it returns 0 (fails) and GetLastError() gives : 1722 (RPC server is unavailable). Has anyone seen this before?

I call EnumPorts in the install, but when I call the uninstall it gives this error.

Further info: this is in a driver and being built with WDK 7100

Code:

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  DWORD needed(0);
  DWORD returned(0);
  DWORD status = ERROR_SUCCESS;
  DWORD err;
  SetLastError(ERROR_SUCCESS);

  BOOL brc = EnumPorts(NULL, 1, NULL, 0, &needed, &returned);
  err = GetLastError();//err = 1722 at this point
  PORT_INFO_1* port_into_1s = (PORT_INFO_1*) new BYTE[needed];
  brc = EnumPorts(NULL, 1, (PBYTE) port_into_1s, needed, &needed, &returned);
  err = GetLastError();  err = 1722 at this point

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Solved. Turns out I called EnumPorts() when we still had teh spooler turned off. Changed the call to after we restart the spooler and worked great.