Connect IIS7 to MSSQL 2008 (db connections) for mucore

I'm currently using IIS7 to run a MU online private server websites ([login to view URL]) it is using the cms mucore. I believe its using old connection methods for (mssql2000 and mssql2005) but no compatible with the new sqlsrv connections. I managed to get it work with xampp using this guide [login to view URL] only took the dll (didn't do the connect method etc) but it hasn't work for iis7. does anyone understand my issue ?