php and sql server

I uploaded the dll "php_mssql.dll" on the computer, but I get this message :
"unable to load dynamic library.." when i run php.
Do you think there is something else to change on the php.ini or somewhere else ?
The thing is that I already had that dll on the computer (an old version) and I could do a query, but this dll doesn't support the functions mssql_init and mssql_execute and mssql_bind. So I need this new dll.
I use easyPhp do you think it can come from that ?

Thanks for all your help.

I've never used easyPHP myself, but have you setup the proper extensions directory in your PHP.INI file? just search for extension_dir in php.ini and make sure you set it to the directory where your extension DLL's are located.

I removed the comment in the PHP ini correctly.
Caus' I already had this dll on the computer, I could use the mssql* functions except for the mssql_init(), mssql_execute...
Si I thought it comes from the dll, which musn't be updated.
I downloaded an updated one, and I had the problem exposed before.
See it's very strange.

Thank you for your Help anyway.

Did it happent to someoneelse ????