Checking if your kit is complete...
Looks good
Note (probably harmless): No library found for '-lm'
Note (probably harmless): No library found for 'oldnames.lib'
Note (probably harmless): No library found for 'msvcrt.lib'
Writing Makefile for Net::sFlow

Microsoft (R) Program Maintenance Utility   Version 6.00.8168.0
Copyright (C) Microsoft Corp 1988-1998. All rights reserved.

cp sFlow.pm blib\lib\Net\sFlow.pm

Microsoft (R) Program Maintenance Utility   Version 6.00.8168.0
Copyright (C) Microsoft Corp 1988-1998. All rights reserved.

	D:\cpanrun\build\5-6-1\bin\perl.exe -Iblib\arch -Iblib\lib -Id:\cpanrun\build\5-6-1\lib -Id:\cpanrun\build\5-6-1\lib test.pl
ok 1 - use Net::sFlow;
ok 2 - use Math::BigInt;
1..2

Microsoft (R) Program Maintenance Utility   Version 6.00.8168.0
Copyright (C) Microsoft Corp 1988-1998. All rights reserved.

Installing D:\cpanrun\build\5-6-1\site\lib\Net\sFlow.pm
Writing d:\cpanrun\build\5-6-1\site\lib\auto\Net\sFlow\.packlist
Appending installation info to d:\cpanrun\build\5-6-1\lib/perllocal.pod