ImpREC.dll & reversing

[FEUERRADER]

I want use ImpREC.dll in my unpacker, but it works only on winNT-systems HOWEVER, GUW32 use THIS ImpREC.dll and successfully rebuild import on win9x! It's a paradox!!!
In my unpacker ImpREC.dll on win9x import looks like:
=============================
KERNEL32.dll 1
FlushInstructionCache 1
FlushInstructionCache 1
FlushInstructionCache KERNEL32.dll 1
FlushInstructionCache 1
FlushInstructionCache 1
FlushInstructionCache 1
FlushInstructionCache 1
FlushInstructionCache 1
FlushInstructionCache 1
FlushInstructionCache 1
FlushInstructionCache 1
FlushInstructionCache 1
FlushInstructionCache 1
FlushInstructionCache 1
FlushInstructionCache 1
FlushInstructionCache 1
FlushInstructionCache 1
FlushInstructionCache 1
FlushInstructionCache
=============================
On WinXP my unpacker works fine, but on win9x import filled FlushInstructionCache functions.

Rebuild function looks like:
BOOL RebuildImport(DWORD pid, DWORD oep_rva, DWORD iat_rva, DWORD nb_recursion, LPTSTR dump_filename);

Syntax of my call on MSVC++ 6.0:
RebuildImport(pi.dwProcessId, 0x401000, 0, 5, m_Dumpname);

What is nb_recursion??? I reversed PEiD Generic Unpacker by Snaker and there found this number. There was 5.
What number must be there??

p.s. sorry for my ugly english