I'm not kidding here. Microsoft is infamous for hiccups.
As to MS SQL SERVER 2005 and Oracle, both have "requirements", I won't check them for you (no need to duplicate ready web content) but I do want to share the successes I'm having with MySQL. Try that.
Can I install all the software like VB.NET 2005, SQL SERVER 2005, ORACLE 10g, J2EE products and all compatible softwares of XP Professional in XP Media Center and work with them without any hiccups...??