How to increase Thread local storage limit ?

My problem is my product run naisly (with out failed)in windows 2000 .
because windows 2000 supports more than 2000 slots

but in Win NT faild because WinNT supports only 64 slots per process

please give me clear idea on this (OS slots differences and how to achive?)

Thread local storage is implemented by kernel32.dll so you're limited by what the OS can provide.
So you must either upgrade the OS to 2000 or higher or create an alternative to TLS yourself.